APA (7th ed.) Citation

Hacks, P., & Proft, I. ;. H. P. (1980). Armer Ritter (2. Auflage.). Kinderbuchverlag.

Chicago Style (17th ed.) Citation

Hacks, Peter, and Irmhild ; Hilmar Proft Proft. Armer Ritter. 2. Auflage. Berlin: Kinderbuchverlag, 1980.

MLA (8th ed.) Citation

Hacks, Peter, and Irmhild ; Hilmar Proft Proft. Armer Ritter. 2. Auflage. Kinderbuchverlag, 1980.

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