APA (7th ed.) Citation

Schaefer, F. W. (1933). Aus schwerer Zeit. Werner.

Chicago Style (17th ed.) Citation

Schaefer, Friedrich Wilhelm. Aus Schwerer Zeit. Langen: Werner, 1933.

MLA (9th ed.) Citation

Schaefer, Friedrich Wilhelm. Aus Schwerer Zeit. Werner, 1933.

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