Cita APA (7th ed.)
Duska, R., & Whelan, M. Moral Development: A Guide to Piaget and Kohlberg. Paulist Press.
Cita Chicago (17th ed.)
Duska, Ronald, i Mariellen Whelan. Moral Development: A Guide to Piaget and Kohlberg. Nueva York, EUA: Paulist Press.
Cita MLA (9th ed.)
Duska, Ronald, i Mariellen Whelan. Moral Development: A Guide to Piaget and Kohlberg. Paulist Press.
Atenció: Aquestes cites poden no estar 100% correctes.