@book{2597,
	author = {Singleton, Royce. and Straits, Bruce C.},
	title = {Approaches to social research /},
	publisher = {Oxford University Press,},
	year = {1999.},
	address = {New York :},
	edition = {3rd ed.},
	url = {http://www.loc.gov/catdir/enhancements/fy0637/97036851-d.html}
}