@book{273690,
	author = {Rubin, Allen, and Babbie, Earl R.,},
	title = {Essential research methods for social work /},
	publisher = {Cengage Learning,},
	year = {©2016},
	series = {Cengage Learning empowerment series},
	address = {Boston, MA},
	edition = {Fourth edition.},
	note = {Previously published: 2013.},
	url = {http://www.loc.gov/catdir/enhancements/fy1510/2014949462-b.html}
}