Παραπομπή σε μορφή APA (7η εκδ.)

Gula, R. M. (1982). What are they saying about moral norms? Paulist Press.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Gula, Richard M. What Are They Saying About Moral Norms? New York: Paulist Press, 1982.

Παραπομπή σε μορφή MLA (9th εκδ.)

Gula, Richard M. What Are They Saying About Moral Norms? Paulist Press, 1982.