Build backlink from Profile PR8 - 10

Building backlinks is very important in the process of keyword ranking. Those who have looked at the system when this title is still crave attention but drool.
This is not the link from the link in the form of content, which is a link in the profile section of the website is in the list below.

Main Domain	PageRank (PR)	Anchor Text	Dofollow / nofollow
http://www.mozilla.org	9	YES	Dofollow / nofollow
http://www.google.com	9	YES	Dofollow
http://www.blogger.com	9	YES	Dofollow
http://www.ilo.org	9	YES	Dofollow
http://wordpress.org	9	YES	Dofollow
https://www.openstreetmap.org	9	YES	Dofollow
http://www.adobe.com	9		Dofollow
http://www.apple.com	9		Dofollow
http://www.opera.com	9	YES	Dofollow
http://www.nature.com	9	YES	Dofollow
http://mit.edu	9		Dofollow
http://www.hp.com/	9	YES	Dofollow
http://issuu.com	9		Dofollow
http://moodle.org	9	YES	Dofollow
http://www.aol.com	9		Dofollow
http://www.flickr.com	9	YES	Nofollow
http://www.yahoo.com	9	YES	Nofollow
http://vimeo.com	9	YES	Nofollow
http://www.univie.ac.at	9	YES	Dofollow
http://nus.edu.sg/	9	YES	Dofollow
http://www.universia.es	10	YES	Dofollow
http://www.amazon.com/	8		Dofollow
http://www.typepad.com/	8		Dofollow
http://www.eventbrite.com	8	YES	Dofollow
http://www.mozilla.org	9	YES	Dofollow / nofollow
http://www.google.com	9	YES	Dofollow
http://www.blogger.com	9	YES	Dofollow
http://www.ilo.org	9	YES	Dofollow
http://wordpress.org	9	YES	Dofollow
https://www.openstreetmap.org	9	YES	Dofollow
http://www.adobe.com	9		Dofollow
http://www.apple.com	9		Dofollow
http://www.opera.com	9	YES	Dofollow
http://www.nature.com	9	YES	Dofollow
http://mit.edu	9		Dofollow
http://www.hp.com/	9	YES	Dofollow
http://issuu.com	9		Dofollow
http://moodle.org	9	YES	Dofollow
http://www.aol.com	9		Dofollow
http://www.flickr.com	9	YES	Nofollow
http://www.yahoo.com	9	YES	Nofollow
http://vimeo.com	9	YES	Nofollow
http://www.univie.ac.at	9	YES	Dofollow
http://nus.edu.sg/	9	YES	Dofollow
http://www.universia.es	10	YES	Dofollow
http://www.amazon.com/	8		Dofollow
http://www.typepad.com/	8		Dofollow
http://www.eventbrite.com	8	YES	Dofollow
http://gravatar.com/	8	YES	Dofollow
http://www.microsoft.com	8	YES	Dofollow
http://www.bing.com/	8	YES	Dofollow / nofollow
http://www.skype.com	8		Dofollow
http://www.ibm.com	8	YES	Dofollow
http://www.typepad.com/	8		Dofollow
http://www.livejournal.com/	8	YES	Dofollow
http://www.wix.com/	8	YES	Dofollow
http://slashdot.org	8	YES	Nofollow
http://www.symantec.com	8	YES	Dofollow
http://www.intel.com	8		Dofollow
http://www.ohloh.net	8		Dofollow
http://www.last.fm	8	YES	Nofollow
https://www.zotero.org	8	YES	Nofollow
http://help.com	8	YES	Dofollow
http://stanford.edu/	8	YES	Nofollow
http://www.cisco.com/	8		Dofollow
http://www.att.com/	8		Dofollow
http://www.panoramio.com	8		Dofollow
http://www.tumblr.com/	8	YES	Dofollow
http://pinterest.com/	8		Nofollow