Lefton, Lester A., 1946- Psychology / Lester A. Lefton. - 6th ed. - Boston : Allyn and Bacon, c1997. - 1 v. (various pagings) : ill. (some col.) ; 29 cm. ISBN: 0205189954 (hardcover) LCCN: 96019231 LC Class. No.: BF121 .L424 1997 / .L424 1997 Dewey Class. No.: 150