@book{153440,
	author = {Marcus, Bess H. and Forsyth, LeighAnn H.},
	title = {Motivating people to be physically active},
	publisher = {Human Kinetics},
	year = {2009},
	series = {Physical activity intervention series},
	address = {United States of America},
	edition = {2nd ed.},
	note = {includes bibliographical references and index}
}