Berk, Laura E. Exploring lifespan development / Laura E. Berk. - 1st ed. - Boston : Allyn and Bacon, 2008. - xxiv, 519, [124] p. : ill. (chiefly col.) ; 28 cm. ISBN: 0205522688 (pbk.) 9780205522682 Subjects--Topical Terms: Developmental psychology--Textbooks