janiko

This plugin allows references and citations in your posts. It’s only a beta version, so if you find issues or if you think it lacks some features, please contact me.
To use it, simply add your reference using a shortcode you can choose (‘jref’ by default), and a few attributes (always use lowercase):
<ul>
<li>title (mandatory)</li>
<li>author</li>
<li>date</li>
<li>url</li>
<li>editor</li>
<li>page</li>
<li>lang</li>
<li>readon</li>
</ul>
There are no specific controls on the content of those attributes, you may add any text you want. Only ‘title’ is mandatory. All attributes roles are easy to understand; ‘page’ is for a book (but can be used for any content), ‘readon’ is the date you last consult the reference.
Again, in this first release, there’s no specific control or action triggered by attribute’s content (like verifying the format, or linking to an archive site). Maybe in a future release…
A list of all references will be added at the end of the post.
Here are some examples:
<ul>
<li>[jref]url=http://geba.fr|date=janv 2017|title=The Title.|author=Janiko|lang=FR|editor=geba.fr|page=p.5[/jref]</li>
<li>[jref name=’numref’]url=http://geba.fr|date=janv 2017|title=The Title.|author=Janiko|lang=FR|editor=geba.fr|page=p.5[/jref]</li>
<li>[jref name=’numref’ /]</li>
</ul>
You can optionnaly add a name to the citation, so you can reuse it in your post. Important note: the displayed attributes will be the attributes of the FIRST reference with that name. Any other attribute will be ignored.

JReferences

This plugin adds references and citations functionalities (in a wikipedia-like style).

johnmate

CiteKite validates online quotations to prove they are accurate. The CiteKite plugin for WordPress helps you easily integrate CiteKite with your WordPress site. See more about CiteKite at http://citekite.com
With CiteKite in place, you’re enhancing and verifying the credibility of online quotations.
A CiteKite verified label means that a quotation has been independently verified by CiteKite, by comparing it to its source on a webpage. The reader can see more information about the quotation, including the web address of the source material and its context, by clicking on the CiteKite label.
There’s no charge to start using CiteKite. Even higher-volume websites can use CiteKite for a small yearly fee. And if the original source material goes offline, there’s no need to worry – we keep a record, so your quotation can still be verified and your site’s visitors can find out when it was last available.
<h4>When you quote someone else</h4>
CiteKite enhances your credibility, because it shows that you’ve taken time to make sure an online quotation is accurate. When you add CiteKite to your website or blog, we’ll check quotations for accuracy and give your site’s visitors extra information and a link to the original source of the quotation.
<h4>When someone else quotes you</h4>
When someone wants to quote your website, CiteKite can help make sure that your work is credited properly. We think transparency is vital – so CiteKite makes it easy to ensure credibility all round, in an easy and user-friendly way. You could even add this to your copyright notice

CiteKite

CiteKite automatically validates quotations you make of other websites and lets the world know you care.

JReferences vs CiteKite