diff --git a/csl/a251.csl b/csl/a251.csl
new file mode 100644
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+++ b/csl/a251.csl
@@ -0,0 +1,166 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<style xmlns="http://purl.org/net/xbiblio/csl" class="in-text" xml:lang="en">
+  <info>
+    <title>Open University A251 format</title>
+    <id>http://www.zotero.org/styles/ou-a251</id>
+    <link>http://www.zotero.org/styles/ou-a251</link>
+    <author>
+      <name>Julian Onions</name>
+      <email>julian.onions@gmail.com</email>
+    </author>
+    <updated>2007-11-01T03:33:00+05:00</updated>
+    <summary>Style for the Open University Arts course A251.</summary>
+    <category term="author-date"/>
+    <category term="history"/>
+  </info>
+  <macro name="editor">
+    <names variable="editor" prefix="(" suffix=")" delimiter=", ">
+      <name and="text" initialize-with=". " delimiter=", "/>
+      <label form="short" prefix=", " text-transform="lowercase" suffix="."/>
+    </names>
+  </macro>
+  <macro name="author">
+    <names variable="author">
+      <name name-as-sort-order="all" and="text" sort-separator=", " initialize-with=". "
+	    delimiter=", "/>
+      <label form="short" prefix=" (" suffix=".)" text-transform="lowercase"/>
+      <substitute>
+	<names variable="editor"/>
+	<text macro="title"/>
+      </substitute>
+    </names>
+  </macro>
+  <macro name="author-short">
+    <choose>
+      <if variable="volume" type="book" match="all">
+	<text variable="volume" />
+      </if>
+      <else>
+	<names variable="author">
+	  <name form="short" and="text" delimiter=", " initialize-with=". "/>
+	  <substitute>
+	    <names variable="editor"/>
+	    <names variable="translator"/>
+	    <choose>
+	      <if type="book">
+		<text variable="title" form="short" font-style="italic"/>
+	      </if>
+	      <else>
+		<text variable="title" form="short"/>
+	      </else>
+	    </choose>
+	  </substitute>
+	</names>
+	<date variable="issued" prefix=", ">
+	  <date-part name="year"/>
+	</date>
+
+      </else>
+    </choose>
+  </macro>
+  <macro name="access">
+    <group>
+      <text value="[online]" suffix=" "/>
+      <text variable="URL"/>
+      <group prefix=" (" suffix=")">
+	<text term="accessed" text-transform="capitalize" suffix=" "/>
+	<date variable="accessed">
+	  <date-part name="month" suffix=" "/>
+	  <date-part name="day" suffix=", "/>
+	  <date-part name="year"/>
+	</date>
+      </group>
+    </group>
+  </macro>
+  <macro name="title">
+    <choose>
+      <if type="book">
+	<text variable="title" font-style="italic"/>
+      </if>
+      <else>
+	<text variable="title"/>
+      </else>
+    </choose>
+  </macro>
+  <macro name="publisher">
+    <group delimiter=", ">
+      <text variable="publisher-place"/>
+      <text variable="publisher"/>
+    </group>
+  </macro>
+  <citation>
+    <option name="et-al-min" value="6"/>
+    <option name="et-al-use-first" value="6"/>
+    <option name="et-al-subsequent-min" value="6"/>
+    <option name="et-al-subsequent-use-first" value="1"/>
+    <option name="disambiguate-add-year-suffix" value="true"/>
+    <option name="disambiguate-add-names" value="true"/>
+    <option name="disambiguate-add-givenname" value="true"/>
+    <layout prefix="(" suffix=")" delimiter="; ">
+      <text macro="author-short"/>
+      <label variable="locator" prefix=", " suffix="." form="short"/>
+      <text variable="locator" prefix=" "/>
+    </layout>
+  </citation>
+  <bibliography>
+    <option name="hanging-indent" value="true"/>
+    <option name="et-al-min" value="6"/>
+    <option name="et-al-use-first" value="6"/>
+    <sort>
+      <key macro="author"/>
+      <key variable="title"/>
+    </sort>
+    <layout>
+      <text macro="author" suffix=" "/>
+      <date variable="issued" prefix=" (" suffix=")">
+	<date-part name="year"/>
+      </date>
+      <choose>
+	<if type="book">
+	  <group suffix=",">
+	    <text macro="title" prefix=" "/>
+	    <text macro="editor" prefix=" "/>
+	  </group>
+	  <text prefix=" " suffix="." macro="publisher"/>
+	</if>
+	<else-if type="chapter">
+	  <text macro="title" prefix=" " quotes="true"/>
+	  <group class="container" prefix=" ">
+	    <text term="in" text-transform="lowercase"/>
+	    <names variable="editor" prefix=" " suffix="," delimiter=", ">
+	      <name and="text" sort-separator=", " initialize-with=". "/>
+	      <label form="short" prefix=" (" suffix=".)" text-transform="lowercase"/>
+	    </names>
+	    <text variable="container-title" font-style="italic" prefix=" " suffix="."/>
+	    <text variable="collection-title" prefix=" " suffix="."/>
+	    <group suffix=".">
+	      <text macro="publisher" prefix=" "/>
+	      <group prefix=", ">
+		<label variable="page" form="short" suffix=". "/>
+		<text variable="page"/>
+	      </group>
+	    </group>
+	  </group>
+	</else-if>
+	<else>
+	  <group suffix=".">
+	    <text macro="title" prefix=" " quotes="true"/>
+	    <text macro="editor" prefix=" "/>
+	  </group>
+	  <group class="container" prefix=" " suffix=".">
+	    <text variable="container-title" font-style="italic"/>
+	    <group prefix=", ">
+	      <text variable="volume" />
+	      <text variable="issue" prefix="/"/>
+	    </group>
+	    <group prefix=", ">
+	      <label variable="page" form="short" suffix="."/>
+	      <text variable="page"/>
+	    </group>
+	  </group>
+	</else>
+      </choose>
+      <text prefix=" " macro="access" suffix="."/>
+    </layout>
+  </bibliography>
+</style>