Cita APA (7th ed.)

Trippen, N. (2012). Joseph Kardinal Höffner. Schöningh.

Cita Chicago (17th ed.)

Trippen, Norbert. Joseph Kardinal Höffner. Paderborn [u.a.]: Schöningh, 2012.

Cita MLA (8th ed.)

Trippen, Norbert. Joseph Kardinal Höffner. Schöningh, 2012.