@book{18913,
	author = {Babbie, Earl R.},
	title = {The practice of social research /},
	publisher = {CENGAGE Learning,},
	year = {c2016.},
	address = {Boston, MA :},
	edition = {Fourteenth edition.},
	url = {http://www.loc.gov/catdir/enhancements/fy1510/2014944053-b.html}
}