APA (7th ed.) Citation

Heinberg, E. (1931). Ulla, die kleine Helferin. Thienemann.

Chicago Style (17th ed.) Citation

Heinberg, Erna. Ulla, Die Kleine Helferin. Stuttgart: Thienemann, 1931.

MLA (9th ed.) Citation

Heinberg, Erna. Ulla, Die Kleine Helferin. Thienemann, 1931.

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