Cita APA (7a ed.)

Wessel, P. (1889). Das Mittelalter. Perthes.

Cita Chicago Style (17a ed.)

Wessel, Paul. Das Mittelalter. Gotha: Perthes, 1889.

Cita MLA (9a ed.)

Wessel, Paul. Das Mittelalter. Perthes, 1889.