Cita APA (7a ed.)

Trippen, N. (1939). Josef Kardinal Frings: Norbert Trippen. Schöningh.

Cita Chicago Style (17a ed.)

Trippen, Norbert. Josef Kardinal Frings: Norbert Trippen. Paderborn [u.a.]: Schöningh, 1939.

Cita MLA (8a ed.)

Trippen, Norbert. Josef Kardinal Frings: Norbert Trippen. Schöningh, 1939.