Cita APA (7th ed.)
Niebuhr, R. An interpretation of Christian ethics. Harper & Brothers.
Cita Chicago (17th ed.)
Niebuhr, Reinhold. An Interpretation of Christian Ethics. New York: Harper & Brothers.
Cita MLA (9th ed.)
Niebuhr, Reinhold. An Interpretation of Christian Ethics. Harper & Brothers.
Atenció: Aquestes cites poden no estar 100% correctes.