APA (7th ed.) Citation

Ahnert, P. (1951). Die Himmelserscheinungen 1951. Thüringer Volks-Kalender.

Chicago Style (17th ed.) Citation

Ahnert, Paul. "Die Himmelserscheinungen 1951." Thüringer Volks-Kalender 1951.

MLA (8th ed.) Citation

Ahnert, Paul. "Die Himmelserscheinungen 1951." Thüringer Volks-Kalender, 1951.

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