Gaya APA

Hoyer, W, J., Roodin, P, A. (2009). Adult Development and Aging 6'th Ed. (6). New York: McGraw-Hill Companies.

Gaya MLA

Hoyer, William, J.., Roodin, Paul, A.. "Adult Development and Aging 6'th Ed.". 6 New York: McGraw-Hill Companies, 2009. Text.