APA (7th ed.) Citation

Erler, F., & Spiegel, F. (1915). 1914-1915. Troitzsch.

Chicago Style (17th ed.) Citation

Erler, Fritz, and Ferdinand Spiegel. 1914-1915. Berlin-Schöneberg: Troitzsch, 1915.

MLA (9th ed.) Citation

Erler, Fritz, and Ferdinand Spiegel. 1914-1915. Troitzsch, 1915.

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