@book{137630,
	author = {Cooper, Donald R. and Schindler, Pamela S.},
	title = {Business research methods /},
	publisher = {McGraw-Hill/Irwin,},
	year = {2014.},
	series = {The McGraw-Hill/Irwin series in operations and decision sciences business statistics},
	address = {New York, NY :},
	edition = {Twelfth edition.}
}