Gaya APA

Saputra, H, S., Santrock, J, W. (2014). Essentials Of Life-span Development (Third). New York: McGraw-Hill Companies.

Gaya MLA

Saputra, Heru, S.P.., Santrock, John, W. "Essentials Of Life-span Development". Third New York: McGraw-Hill Companies, 2014. Text.