Gaya APA

Kuhlen, R, G., Thompson, G, G. (1970). Psychological Studies of Human Development (Ed.3). New York: Appleton-Century-Crofts.

Gaya MLA

Kuhlen, Raymond, G.., Thompson, George, G.. "Psychological Studies of Human Development". Ed.3 New York: Appleton-Century-Crofts, 1970. Buku PSI.