APA (7th ed.) Citation

Bonhoeffer, D., & Bethge, E. (1971). Letters and papers from prison (Enlarged ed.). SCM Press.

Chicago Style (17th ed.) Citation

Bonhoeffer, Dietrich, and Eberhard Bethge. Letters and Papers from Prison. Enlarged ed. London: SCM Press, 1971.

MLA (9th ed.) Citation

Bonhoeffer, Dietrich, and Eberhard Bethge. Letters and Papers from Prison. Enlarged ed. SCM Press, 1971.