APA (7th ed.) Citation

Ahnert, P. (1949). Astronomie und Kultur. Thüringer Volks-Kalender.

Chicago Style (17th ed.) Citation

Ahnert, Paul. "Astronomie Und Kultur." Thüringer Volks-Kalender 1949.

MLA (8th ed.) Citation

Ahnert, Paul. "Astronomie Und Kultur." Thüringer Volks-Kalender, 1949.

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