Gaya APA

Shaffer, D, R., Kipp, K. (2009). Developmental Psychology Childhood and Adolescence . Belmont, CA, Amerika Serikat: Wadsworth Publishing Co Inc.

Gaya MLA

Shaffer, David, R., Kipp, Katherine. "Developmental Psychology Childhood and Adolescence". Belmont, CA, Amerika Serikat: Wadsworth Publishing Co Inc, 2009. Text.