APA (7e ed.) Bronvermelding

Duska, R., & Whelan, M. (1975). Moral development: A guide to Piaget and Kohlberg. Paulist Press.

Chicago (17e ed.) Bronvermelding

Duska, Ronald, en Mariellen Whelan. Moral Development: A Guide to Piaget and Kohlberg. New York: Paulist Press, 1975.

MLA (9e ed.) Bronvermelding

Duska, Ronald, en Mariellen Whelan. Moral Development: A Guide to Piaget and Kohlberg. Paulist Press, 1975.