@book{20709,
	author = {Gravetter, Frederick J. and Forzano, Lori-Ann B., jt. aut.},
	title = {Research methods for the behavioral sciences /},
	publisher = {Wadsworth,},
	year = {2003.},
	address = {Belmont, Calif :},
	note = {Includes bibliographical references and index.}
}