APA (7th ed.) Citation

Thomas, V., & Günther, U. (2009). Herzlichen Glückwunsch, Zilly! Beltz & Gelberg.

Chicago Style (17th ed.) Citation

Thomas, Valerie, and Ulli Günther. Herzlichen Glückwunsch, Zilly! Weinheim ; Basel: Beltz & Gelberg, 2009.

MLA (9th ed.) Citation

Thomas, Valerie, and Ulli Günther. Herzlichen Glückwunsch, Zilly! Beltz & Gelberg, 2009.

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