APA (7th ed.) Citation

Koenen, K., & Kühschelm, R. (1999). Zeitenwende. Echter.

Chicago Style (17th ed.) Citation

Koenen, Klaus, and Roman Kühschelm. Zeitenwende. Würzburg: Echter, 1999.

MLA (8th ed.) Citation

Koenen, Klaus, and Roman Kühschelm. Zeitenwende. Echter, 1999.

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