APA (7th ed.) Citation

Wagner, H., & Guthe, H. (1912). Allgemeine Erdkunde Lehrbuch der Geographie..

Chicago Style (17th ed.) Citation

Wagner, Hermann, and Hermann Guthe. "Allgemeine Erdkunde." Lehrbuch Der Geographie. 1912.

MLA (9th ed.) Citation

Wagner, Hermann, and Hermann Guthe. "Allgemeine Erdkunde." Lehrbuch Der Geographie., 1912.

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