APA (7th ed.) Citation

Frenzel, I., & Kaster, L. (1978). Düsseldorf. Belser.

Chicago Style (17th ed.) Citation

Frenzel, Ivo, and Lothar Kaster. Düsseldorf. Stuttgart ; Zürich: Belser, 1978.

MLA (9th ed.) Citation

Frenzel, Ivo, and Lothar Kaster. Düsseldorf. Belser, 1978.