@book{233283,
	author = {Babbie, Earl R.},
	title = {The practice of social research /},
	publisher = {Wadsworth Thomson Learning,},
	year = {c2001.},
	address = {Belmont, CA :},
	edition = {9th ed.},
	url = {http://www.loc.gov/catdir/enhancements/fy1515/00034971-b.html}
}