Gaya APA

Shaffer, D, R., Kipp, K. (2010). Developmental Psychology: Childhood and Adolescence (8th Edition). United States of America: Wadsworth Cengage Learning.

Gaya MLA

Shaffer, David, R.., Kipp, Katherine. "Developmental Psychology: Childhood and Adolescence". 8th Edition United States of America: Wadsworth Cengage Learning, 2010. Text.