APA (7th ed.) Citation

Schippmann, A., & Schrade, H. (1990). English for you. Volk und Wissen.

Chicago Style (17th ed.) Citation

Schippmann, Annelie, and Horst Schrade. English for You. Berlin: Volk und Wissen, 1990.

MLA (8th ed.) Citation

Schippmann, Annelie, and Horst Schrade. English for You. Volk und Wissen, 1990.