APA (7th ed.) Citation

Kaemmel, O., & Diestel, G. (1911). Geschichte des Mittelalters. Otto Spamer.

Chicago Style (17th ed.) Citation

Kaemmel, Otto, and G. Diestel. Geschichte Des Mittelalters. Leipzig: Otto Spamer, 1911.

MLA (9th ed.) Citation

Kaemmel, Otto, and G. Diestel. Geschichte Des Mittelalters. Otto Spamer, 1911.

Warning: These citations may not always be 100% accurate.