Gaya APA

Hoyer, W, J., Roodin, P, A. (2003). Adult Development and Aging (ed. 5). New York: McGraw-Hill Higher Education.

Gaya MLA

Hoyer, William, J.., Roodin, Paul, A.. "Adult Development and Aging". ed. 5 New York: McGraw-Hill Higher Education, 2003. Text.