http://www.psmag.com/books-and-culture/fraternity-sorority-members-likely-graduate-time-greek-women-75861

http://fraternityadvocate.com/2015/03/economic-impact-of-greek-life/

http://www.tcf.org/work/education/detail/separate-but-unequal-in-college-greek-life

http://www.investopedia.com/financial-edge/0812/should-you-join-a-sorority-or-fraternity.aspx