APA (7th ed.) Citation

Wellm, A. (1990). Karlchen Duckdich. Der Kinderbuchverlag.

Chicago Style (17th ed.) Citation

Wellm, Alfred. Karlchen Duckdich. Berlin: Der Kinderbuchverlag, 1990.

MLA (8th ed.) Citation

Wellm, Alfred. Karlchen Duckdich. Der Kinderbuchverlag, 1990.

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