APA (7th ed.) Zitazioa
Long, E. L. (1967). A survey of Christian Ethics. Oxford University Press.
Chicago Style (17th ed.) Zitazioa
Long, Edward LeRoy. A Survey of Christian Ethics. London: Oxford University Press, 1967.
MLA (9th ed.) Zitazioa
Long, Edward LeRoy. A Survey of Christian Ethics. Oxford University Press, 1967.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.