Downs, William Missouri. The art of theatre : a concise introduction / William Missouri Downs, Lou Anne Wright, Erik Ramsey. - 3rd ed. - Boston, MA : Wadsworth, Cengage Learning, 2011. - p. cm. ISBN: 9781111348311 (student edition) RM405.95 9781111836634 (instructor edition) LCCN: 2011-940410