PowieT

This widget plugin will display a backlink to the parent page at the end of subpages
<ul>
<li>Only on subpages</li>
<li>at the end of the page</li>
<li>link to the parent page</li>
</ul>

Parent Page Link

This widget plugin will display a backlink to the parent page at the end of subpages

sunnyverma1984

Backlinks are crucial to SEO. Google gives more importance to website that have higher number of quality backlinks. 
A website with good amount of backlinks will get higher position in SERP.
Backlink Checker Plugin helps blogger to find list of webpages pointing their blog using anchor tag. 
This plugin also shows anchor text and type of backlink (doFollow or noFollow).
This plugin uses free MOZ API to generate backlink report. 
To use this plugin you have to get free <a href="https://moz.com/community/join" rel="nofollow ugc">moz account</a> with <a href="https://moz.com/products/api" rel="nofollow ugc">API access</a>.

Backlink Checker

Get the list of backlinks pointing to your blog

Parent Page Link vs Backlink Checker