APA (7th ed.) Citation

Bismarck, O., & Rothfels, H. (1955). Bismarck-Briefe. Vandenhoeck & Ruprecht.

Chicago Style (17th ed.) Citation

Bismarck, Otto, and Hans Rothfels. Bismarck-Briefe. Gottingen: Vandenhoeck & Ruprecht, 1955.

MLA (9th ed.) Citation

Bismarck, Otto, and Hans Rothfels. Bismarck-Briefe. Vandenhoeck & Ruprecht, 1955.