APA (7th ed.) Citation

(1902). Geschichtliche Untersuchungen. Perthes.

Chicago Style (17th ed.) Citation

Geschichtliche Untersuchungen. Gotha: Perthes, 1902.

MLA (9th ed.) Citation

Geschichtliche Untersuchungen. Perthes, 1902.

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