Mugford, Roger Never say no ! : the complete program for a happier and more cooperative dog / Roger Mugford - New York : A Perigee Book , 1994 , c1992. - 207 p. Illus. 12 u.s. includes bibliographical references and index ISBN: 0-399-51884-3 Subjects--Topical Terms: Dogs--- TrainingDogs---Behavior Dewey Class. No.: 636.7 MUG