@book{1428,
	author = {Gravetter, Frederick J. and Wallnau, Larry B.},
	title = {Essentials of statistics for the behavioral sciences /},
	publisher = {Thomson/Wadsworth,},
	year = {c2005.},
	address = {Belmont, CA :},
	edition = {5th ed.},
	note = {Includes bibliographical references and index.}
}