APA (7th ed.) Citation

Billinger, R. (1931). Sichel am Himmel. Insel-Verl.

Chicago Style (17th ed.) Citation

Billinger, Richard. Sichel Am Himmel. Leipzig: Insel-Verl, 1931.

MLA (8th ed.) Citation

Billinger, Richard. Sichel Am Himmel. Insel-Verl, 1931.

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