@book{36140,
	author = {Thomas, Jerry R. and Nelson, Jack K.},
	title = {Research methods in physical activity},
	publisher = {Human Kinetics Publishers},
	year = {c1990.},
	address = {Champaign, Ill.},
	edition = {2nd ed.},
	note = {Rev. ed. of: Introduction to research in health, physical education, recreation, and dance. c1985.}
}