APA (7th ed.) Citation

Harlan, P., & Valentin, E. (1950). Die Fidel-Fibel: Lehrbrief. Heinrichshofen.

Chicago Style (17th ed.) Citation

Harlan, Peter, and Erich Valentin. Die Fidel-Fibel: Lehrbrief. Wilhelmshaven: Heinrichshofen, 1950.

MLA (9th ed.) Citation

Harlan, Peter, and Erich Valentin. Die Fidel-Fibel: Lehrbrief. Heinrichshofen, 1950.

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