You will also like to read How to build quality Backlinks in 1 minute and increase traffic easily.
Now here is the way how to build quality do-follow backlinks from Facebook easily :-Steps you should follow to get these dofollow backlinks from Facebook :-
1. Log in to your Facebook account and after that click here.
2. Secondly click on "ADD STATIC HTML PAGE ".
3. Then Select your Facebook Page from Where you will be getting Facebook do follow backlink.
4. Now click on Welcome Tab as shown in Picture below.
5. After that you will find two another Tab from which you have to click on "EDIT TAB".
6. Now add HTML link like this
<a href = "http://www.FIFAupdates2014.blogspot.com" rel="dofollow"> FIFA WORLDCUP 2014 </a>
7. Finally you are done you got backlinks from facebook and you can check it by clicking on "VIEW TAB AS VISITOR".
Now you will be able to get PR9 backlinks from Facebook and that also do follow. I hope you are able to do this. If it worked for you then don't forget to comment even if you found any problem you can ask me in comment below i would love to reply.