Cita APA (7a ed.)

Bonhoeffer, D., & Bethge, E. (1964). Ethics. The Fontana Library.

Cita Chicago Style (17a ed.)

Bonhoeffer, Dietrich, y Eberhard Bethge. Ethics. Collins: The Fontana Library, 1964.

Cita MLA (9a ed.)

Bonhoeffer, Dietrich, y Eberhard Bethge. Ethics. The Fontana Library, 1964.