Lefton, Lester A., 1946- Psychology / Lester A. Lefton, Linda Brannon. - 9th ed. - Boston, Mass. : Allyn and Bacon, c2006. - xxii, 696 p. : col. ill. ; 29 cm. ISBN: 0205418139 LCCN: 2004065983 LC Class. No.: BF121 .L424 2006 / .L424 2006 Dewey Class. No.: 150