APA (7th ed.) Zitazioa

Niebuhr, R. An interpretation of Christian ethics. Harper & Brothers.

Chicago Style (17th ed.) Zitazioa

Niebuhr, Reinhold. An Interpretation of Christian Ethics. New York: Harper & Brothers.

MLA (9th ed.) Zitazioa

Niebuhr, Reinhold. An Interpretation of Christian Ethics. Harper & Brothers.