APA (7th ed.) Zitazioa
Tillman, W. M. (1988). Understanding Christian ethics. Broadman press.
Chicago Style (17th ed.) Zitazioa
Tillman, William M. Understanding Christian Ethics. Nashville, Tennessee: Broadman press, 1988.
MLA (9th ed.) Zitazioa
Tillman, William M. Understanding Christian Ethics. Broadman press, 1988.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.