Wimmer, Roger D. Mass media research : an introduction / Roger D. Wimmer, Joseph R. Dominick. - 9th ed. - Boston, Mass. : Cengage- Wadsworth, c2011. - xii, 464 p. : ill. (some col.) ; 24 cm. - Wadsworth series in mass communication and journalism. . ISBN: 9781439082744 LCCN: 2009936675 Subjects--Topical Terms: Mass media--Research. Dewey Class. No.: 302.23072 WI MA