sources

ttp://www.icna.org/family/index.php?option=com_content&view=article&id=70&Itemid=4

http://library.cqpress.com/cqresearcher/document.php?id=cqresrre2004050700&type=hitlist&num=0

http://www.upi.com/Health_News/2010/09/29/US-marriage-rate-continues-to-decline/UPI-77271285810979/

http://www.nytimes.com/1992/07/17/us/rate-of-marriage-continues-decline.html

http://www.civitas.org.uk/hwu/cohabitation.php

Marriage and cohabitation By Arland Thornton, William G. Axinn, Yu Xie