Gaya APA

DUSKA, R., Whelan, M. (1975). Moral Development : A guide to Piaget and Kohlberg (First Published). New York: Paulist Press.

Gaya MLA

DUSKA, Ronald., Whelan, Mariellen. "Moral Development : A guide to Piaget and Kohlberg". First Published New York: Paulist Press, 1975. Text.