Cita APA (7a ed.)

Wattendorff, J. (1883). Papst Stephan IX: Julius Wattendorff. Schöningh.

Cita Chicago Style (17a ed.)

Wattendorff, Julius. Papst Stephan IX: Julius Wattendorff. Paderborn: Schöningh, 1883.

Cita MLA (8a ed.)

Wattendorff, Julius. Papst Stephan IX: Julius Wattendorff. Schöningh, 1883.