APA-ийн эшлэл(7 дахь хэвлэлт)

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

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

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

MLA -ийн эшлэл (9 дэх хэвлэлт)

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