APA (7th ed.) Citation

Gay, M., & Birkenstädt, S. (2003). Gute Nacht, Theo. Carlsen.

Chicago Style (17th ed.) Citation

Gay, Marie-Louise, and Sophie Birkenstädt. Gute Nacht, Theo. Hamburg: Carlsen, 2003.

MLA (9th ed.) Citation

Gay, Marie-Louise, and Sophie Birkenstädt. Gute Nacht, Theo. Carlsen, 2003.

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