Gaya APA

Kail, R, V., C, I, C, J. (2013). Human development: a life span view . Sydney: Sydney: Wadsworth, 2013.

Gaya MLA

Kail, Robert, V., C, I., Cavanaugh,, John. "Human development: a life span view". Sydney: Sydney: Wadsworth, 2013, 2013. .