Cita APA (7th ed.)
Bonhoeffer, D. (1955). Ethics. Macmillan.
Cita Chicago (17th ed.)
Bonhoeffer, Dietrich. Ethics. New York: Macmillan, 1955.
Cita MLA (9th ed.)
Bonhoeffer, Dietrich. Ethics. Macmillan, 1955.
Atenció: Aquestes cites poden no estar 100% correctes.