@book{48757,
	author = {Singleton, Royce. and Straits, Bruce C.},
	title = {Approaches to social research /},
	publisher = {Oxford University Press,},
	year = {2005.},
	address = {New York :},
	edition = {4th ed.},
	note = {Includes Index.},
	url = {http://www.loc.gov/catdir/enhancements/fy0617/2004043396-d.html}
}