Gaya APA

HOYER, W, J., Paul, A, R. (2003). Adult development and aging Edisi 5 (Edisi 5). New Yok: McGraw-Hill International Book Company.

Gaya MLA

HOYER, William, J., Paul, A., Roodin. "Adult development and aging Edisi 5". Edisi 5 New Yok: McGraw-Hill International Book Company, 2003. Fakultas Psikologi.