@book{68426,
	author = {Sax, Gilbert.},
	title = {Principles of educational and psychological measurement and evaluation},
	publisher = {Wadsworth Pub. Co.},
	year = {c1980.},
	address = {Belmont, Calif.},
	edition = {2d ed.},
	note = {First ed. published in 1974 under title: Principles of educational measurement and evaluation.}
}