@book{14724,
	author = {Rubin, Allen. and Babbie, Earl R.},
	title = {Research methods for social work, 6th edition /},
	publisher = {Thomson Brooks/Cole,},
	year = {2008.},
	address = {[S.l.] :},
	edition = {6th ed.},
	url = {http://www.amazon.com/exec/obidos/ASIN/049509515X/chopaconline-20}
}