APA (7th ed.) Citation

Hammer, B., & Herzogenrath, W. (1986). Acht in Köln.

Chicago Style (17th ed.) Citation

Hammer, Brigitte, and Wulf Herzogenrath. Acht in Köln. Köln, 1986.

MLA (8th ed.) Citation

Hammer, Brigitte, and Wulf Herzogenrath. Acht in Köln. 1986.

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