Cita APA (7a ed.)

Zimmermann, W., Smith, R. G., & Smith, K. G. (1966). I knew Dietrich Bonhoeffer. Harper & Row.

Cita Chicago Style (17a ed.)

Zimmermann, Wolf-Dieter, Ronald Gregor Smith, y Käthe Gregor Smith. I Knew Dietrich Bonhoeffer. New York [etc.]: Harper & Row, 1966.

Cita MLA (9a ed.)

Zimmermann, Wolf-Dieter, et al. I Knew Dietrich Bonhoeffer. Harper & Row, 1966.