Backlink dari website .edu dan .gov

http://shorelinewa.gov/redirect.aspt?url=http://www.tapanulinews.com
http://blog.lib.umn.edu/brand/blog/2010/03/6-ways-to-optimize-your-seo-fo.php
http://daymare.org/tools/govedubacklinks/ <== mencepin link secara massal
http://sba.gov/community/discussion-boards/developer-resources/sbagov-web-services-discussions/learning-basic-seo-t
http://brainfeedback.cit.nih.gov/welcome-to-brainfeedback-nih-gov/