Use BibTeX with Apple Pages to generate references and a bibliography
Depending on your current Pages version, download CiteInPages from here...

http://jhh.med.virginia.edu/main/CiteInPages

I was able to get this to work in Pages 5.5 using CiteInPages5. It works with BibDesk. It takes a bit to install and configure it, but its a great little package. Apple really should change the name of the Pages app though. Its way too difficult to google any support for it.

EDIT: Hopefully you see this because I don't have the reputation to comment. But I guess I misunderstood your question. Its been a while since I've used CiteInPages, but I was able to get the formatting I wanted by creating a custom template. I was able to do this with some guidance from the BibDesk community mailing list. Here's a rudimentary template for the CSE style that I created.

&lt;$publications&gt;
&lt;$pubType=article?&gt;
&lt;$authors&gt;&lt;$lastName/&gt; &lt;$firstNames&gt;&lt;$firstLetter/&gt;&lt;/$firstNames&gt;&lt;?$authors&gt;, &lt;/$authors&gt;. &lt;$fields.Year/&gt;. &lt;$fields.Title.stringByRemovingCurlyBraces.stringByAppendingFullStopAndSpaceIfNotEmpty/&gt;&lt;$fields.Journal.stringByRemovingTeX/&gt;. &lt;$fields.Volume?&gt;&lt;$fields.Volume/&gt;&lt;$fields.Number.parenthesizedStringIfNotEmpty/&gt;:&lt;/$fields.Volume?&gt;&lt;$fields.Pages.stringByConvertingDoubleHyphenToEndash/&gt;. http://dx.doi.org/&lt;$fields.Doi/&gt;
&lt;/$pubType?&gt;
&lt;$pubType=book?&gt;
&lt;$authors&gt;&lt;$lastName/&gt; &lt;$firstNames&gt;&lt;$firstLetter/&gt;&lt;/$firstNames&gt;&lt;?$authors&gt;, &lt;/$authors&gt;. &lt;$fields.Year/&gt;. &lt;$fields.Title.stringByRemovingCurlyBraces.stringByAppendingFullStopAndSpaceIfNotEmpty/&gt;&lt;$fields.Edition.stringByRemovingTeX/&gt; Edition. &lt;$fields.Address.stringByRemovingTeX/&gt;: &lt;$fields.Publisher.stringByRemovingTeX/&gt;. http://dx.doi.org/&lt;$fields.Doi/&gt;
&lt;/$pubType?&gt;
&lt;$pubType=incollection?&gt;
&lt;$authors&gt;&lt;$lastName/&gt; &lt;$firstNames&gt;&lt;$firstLetter/&gt;&lt;/$firstNames&gt;&lt;?$authors&gt;, &lt;/$authors&gt;. &lt;$fields.Year/&gt;. &lt;$fields.Title.stringByRemovingCurlyBraces.stringByAppendingFullStopAndSpaceIfNotEmpty/&gt;In: &lt;$authors&gt;&lt;$lastName/&gt; &lt;$firstNames&gt;&lt;$firstLetter/&gt;&lt;/$firstNames&gt;&lt;?$authors&gt;, &lt;/$authors&gt;, editors. &lt;$fields.Booktitle.stringByRemovingCurlyBraces.stringByAppendingFullStopAndSpaceIfNotEmpty/&gt;&lt;$fields.Edition.stringByRemovingTeX.stringByAppendingFullStopAndSpaceIfNotEmpty/&gt;ed. &lt;$fields.Address.stringByRemovingTeX/&gt;: &lt;$fields.Publisher.stringByRemovingTeX/&gt;. p. &lt;$fields.Pages.stringByConvertingDoubleHyphenToEndash/&gt;. http://dx.doi.org/&lt;$fields.Doi/&gt;
&lt;/$pubType?&gt;

&lt;/$publications&gt;