Walker, Stephen. Learning theory and behaviour modification / Stephen Walker. - London ; New York : Methuen, c1984. - [6], 184 p. ; 20 cm. - New essential psychology. . Includes index. ISBN: 0416338100 (pbk.) : £2.95 Subjects--Topical Terms: Learning.Behavior modification. Dewey Class. No.: 370.1523 / WAL 1984