diff --git a/ucl-institute-of-education-harvard.csl b/ucl-institute-of-education-harvard.csl
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+<?xml version="1.0" encoding="utf-8"?>
+<style xmlns="http://purl.org/net/xbiblio/csl" class="in-text" version="1.0" demote-non-dropping-particle="sort-only" default-locale="en-GB">
+  <!-- This style was edited with the Visual CSL Editor (https://editor.citationstyles.org/visualEditor/) -->
+  <info>
+    <title>UCL Institute of Education - Harvard</title>
+    <id>http://www.zotero.org/styles/ucl-institute-of-education-harvard</id>
+    <link href="http://www.zotero.org/styles/ucl-institute-of-education-harvard" rel="self"/>
+    <link href="http://www.zotero.org/styles/harvard-cite-them-right-no-et-al" rel="template"/>
+    <link href="https://libguides.ioe.ac.uk/harvard" rel="documentation"/>
+    <author>
+      <name>Zhang, Dekun</name>
+      <email>dekun.zhang.20@ucl.ac.uk</email>
+    </author>
+    <category citation-format="author-date"/>
+    <category field="generic-base"/>
+    <summary>UCL Institute of Education - Harvard for bibliographic entries.</summary>
+    <updated>2020-10-29T08:50:05+00:00</updated>
+    <rights license="http://creativecommons.org/licenses/by-sa/3.0/">This work is licensed under a Creative Commons Attribution-ShareAlike 3.0 License</rights>
+  </info>
+  <locale xml:lang="en-GB">
+    <terms>
+      <term name="editor" form="short">
+        <single>ed.</single>
+        <multiple>eds</multiple>
+      </term>
+      <term name="editortranslator" form="verb">edited and translated by</term>
+      <term name="edition" form="short">edn.</term>
+    </terms>
+  </locale>
+  <macro name="editor">
+    <choose>
+      <if type="chapter paper-conference" match="any">
+        <names variable="container-author" delimiter=", " suffix=", ">
+          <name and="text" initialize-with=". " delimiter=", " sort-separator=", " name-as-sort-order="all"/>
+        </names>
+        <choose>
+          <if variable="container-author" match="none">
+            <names variable="editor translator" delimiter=", ">
+              <name and="text" initialize-with=". " delimiter=", " sort-separator=", " name-as-sort-order="all"/>
+              <label form="short" prefix=" (" suffix=")"/>
+            </names>
+          </if>
+        </choose>
+      </if>
+    </choose>
+  </macro>
+  <macro name="secondary-contributors">
+    <choose>
+      <if type="chapter paper-conference" match="none">
+        <names variable="editor translator" delimiter=". ">
+          <label form="verb" text-case="capitalize-first" suffix=" "/>
+          <name and="text" initialize-with=". " delimiter=", "/>
+        </names>
+      </if>
+      <else-if variable="container-author" match="any">
+        <names variable="editor translator" delimiter=". ">
+          <label form="verb" text-case="capitalize-first" suffix=" "/>
+          <name and="text" initialize-with=". " delimiter=", "/>
+        </names>
+      </else-if>
+    </choose>
+  </macro>
+  <macro name="author">
+    <names variable="author">
+      <name and="text" delimiter-precedes-last="never" initialize-with=". " name-as-sort-order="all"/>
+      <label form="short" prefix=" (" suffix=")"/>
+      <substitute>
+        <names variable="editor"/>
+        <names variable="translator"/>
+        <choose>
+          <if type="article-newspaper article-magazine" match="any">
+            <text variable="container-title" text-case="title" font-style="italic"/>
+          </if>
+          <else>
+            <text macro="title"/>
+          </else>
+        </choose>
+      </substitute>
+    </names>
+  </macro>
+  <macro name="author-short">
+    <names variable="author">
+      <name form="short" and="text" delimiter=", " delimiter-precedes-last="never" initialize-with=". "/>
+      <et-al font-style="italic"/>
+      <substitute>
+        <names variable="editor"/>
+        <names variable="translator"/>
+        <choose>
+          <if type="article-newspaper article-magazine" match="any">
+            <text variable="container-title" text-case="title" font-style="italic"/>
+          </if>
+          <else>
+            <text macro="title"/>
+          </else>
+        </choose>
+      </substitute>
+    </names>
+  </macro>
+  <macro name="access">
+    <choose>
+      <if variable="DOI">
+        <text variable="DOI" prefix="doi: "/>
+      </if>
+      <else-if variable="URL">
+        <text term="available at" suffix=": " text-case="capitalize-first"/>
+        <text variable="URL"/>
+        <group prefix=" (" delimiter=": " suffix=")">
+          <text term="accessed" text-case="capitalize-first"/>
+          <date form="text" variable="accessed">
+            <date-part name="day"/>
+            <date-part name="month"/>
+            <date-part name="year"/>
+          </date>
+        </group>
+      </else-if>
+    </choose>
+  </macro>
+  <macro name="number-volumes">
+    <choose>
+      <if variable="volume" match="none">
+        <group delimiter=" " prefix="(" suffix=")">
+          <text variable="number-of-volumes"/>
+          <label variable="volume" form="short" strip-periods="true"/>
+        </group>
+      </if>
+    </choose>
+  </macro>
+  <macro name="title">
+    <choose>
+      <if type="bill book graphic legal_case legislation motion_picture report song thesis webpage" match="any">
+        <group delimiter=". ">
+          <group delimiter=" ">
+            <text variable="title" font-style="italic"/>
+            <text macro="number-volumes"/>
+          </group>
+          <text macro="edition"/>
+        </group>
+      </if>
+      <else>
+        <text variable="title" form="long" quotes="true"/>
+      </else>
+    </choose>
+  </macro>
+  <macro name="publisher">
+    <choose>
+      <if type="thesis">
+        <group delimiter=". ">
+          <text variable="genre"/>
+          <text variable="publisher"/>
+        </group>
+      </if>
+      <else-if type="report">
+        <group delimiter=". ">
+          <group delimiter=" ">
+            <text variable="genre"/>
+            <text variable="number"/>
+          </group>
+          <group delimiter=": ">
+            <text variable="publisher-place"/>
+            <text variable="publisher"/>
+          </group>
+        </group>
+      </else-if>
+      <else-if type="article-newspaper article-magazine" match="none">
+        <group delimiter=" ">
+          <group delimiter=", ">
+            <choose>
+              <if type="speech" variable="event" match="any">
+                <text variable="event" font-style="italic"/>
+              </if>
+            </choose>
+            <group delimiter=": ">
+              <text variable="publisher-place"/>
+              <text variable="publisher"/>
+            </group>
+          </group>
+          <group prefix="(" suffix=")" delimiter=", ">
+            <text variable="collection-title"/>
+            <text variable="collection-number"/>
+          </group>
+        </group>
+      </else-if>
+    </choose>
+  </macro>
+  <macro name="year-date">
+    <choose>
+      <if variable="issued">
+        <date variable="issued">
+          <date-part name="year"/>
+        </date>
+        <text variable="year-suffix"/>
+      </if>
+      <else>
+        <text term="no date"/>
+        <text variable="year-suffix" prefix=" "/>
+      </else>
+    </choose>
+  </macro>
+  <macro name="locator">
+    <choose>
+      <if type="article-journal">
+        <text variable="volume"/>
+        <text variable="issue" prefix=" (" suffix=")"/>
+      </if>
+    </choose>
+  </macro>
+  <macro name="published-date">
+    <choose>
+      <if type="article-newspaper article-magazine post-weblog speech" match="any">
+        <date variable="issued">
+          <date-part name="day" suffix=" "/>
+          <date-part name="month" form="long"/>
+        </date>
+      </if>
+    </choose>
+  </macro>
+  <macro name="pages">
+    <choose>
+      <if type="chapter paper-conference article-journal article article-magazine article-newspaper book review review-book report" match="any">
+        <group delimiter=" ">
+          <label variable="page" form="short"/>
+          <text variable="page"/>
+        </group>
+      </if>
+    </choose>
+  </macro>
+  <macro name="container-title">
+    <choose>
+      <if variable="container-title">
+        <group delimiter=". ">
+          <text variable="container-title" font-style="italic"/>
+          <text macro="edition"/>
+        </group>
+      </if>
+    </choose>
+  </macro>
+  <macro name="edition">
+    <choose>
+      <if is-numeric="edition">
+        <group delimiter=" ">
+          <number variable="edition" form="ordinal"/>
+          <text term="edition" form="short" strip-periods="true"/>
+        </group>
+      </if>
+      <else>
+        <text variable="edition"/>
+      </else>
+    </choose>
+  </macro>
+  <macro name="container-prefix">
+    <choose>
+      <if type="chapter paper-conference" match="any">
+        <text term="in"/>
+      </if>
+    </choose>
+  </macro>
+  <citation et-al-min="4" et-al-use-first="1" disambiguate-add-year-suffix="true" disambiguate-add-names="true" disambiguate-add-givenname="true" collapse="year">
+    <sort>
+      <key macro="year-date"/>
+    </sort>
+    <layout prefix="(" suffix=")" delimiter="; ">
+      <group delimiter=", ">
+        <group delimiter=", ">
+          <text macro="author-short"/>
+          <text macro="year-date"/>
+        </group>
+        <group>
+          <label variable="locator" form="short" suffix=" "/>
+          <text variable="locator"/>
+        </group>
+      </group>
+    </layout>
+  </citation>
+  <bibliography and="text">
+    <sort>
+      <key macro="author"/>
+      <key macro="year-date"/>
+      <key variable="title"/>
+    </sort>
+    <layout suffix=".">
+      <group delimiter=". ">
+        <group delimiter=". ">
+          <text macro="author"/>
+          <text macro="year-date" prefix="(" suffix=")"/>
+          <group delimiter=". ">
+            <text macro="title"/>
+            <group delimiter=" ">
+              <text macro="container-prefix"/>
+              <text macro="editor"/>
+              <text macro="container-title"/>
+            </group>
+          </group>
+        </group>
+        <text macro="secondary-contributors"/>
+        <text macro="publisher"/>
+      </group>
+      <group delimiter=", " prefix=", ">
+        <text macro="locator"/>
+        <text macro="published-date"/>
+        <text macro="pages"/>
+      </group>
+      <text macro="access" prefix=". "/>
+    </layout>
+  </bibliography>
+</style>