APA-čujuhus (7. p.)
Gula, R. M. (1982). What are they saying about moral norms? Paulist Press.
Chicago-čujuhus (17. p.)
Gula, Richard M. What Are They Saying About Moral Norms? New York: Paulist Press, 1982.
MLA-čujuhus (9. p.)
Gula, Richard M. What Are They Saying About Moral Norms? Paulist Press, 1982.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.