APA (7th ed.) Citation

Sporrong, J., Stern, B., Sturmhoefel, H., & Beck, K. (1972). Die Treppe. Gyldendal.

Chicago Style (17th ed.) Citation

Sporrong, Jack, Börje Stern, Horst Sturmhoefel, and Karie Beck. Die Treppe. Copenhagen: Gyldendal, 1972.

MLA (9th ed.) Citation

Sporrong, Jack, et al. Die Treppe. Gyldendal, 1972.