Gaya APA

Hoyer, W, J., Roodin, P, A. (2003). Adult development and aging (Edisi ke-5). New York: McGraw-Hill.

Gaya MLA

Hoyer, William, J.., Roodin, Paul, A.. "Adult development and aging". Edisi ke-5 New York: McGraw-Hill, 2003. Text.