APA (7th ed.) Citation

Weltzien, F., & Ullrich, J. (2009). Tierperspektiven.

Chicago Style (17th ed.) Citation

Weltzien, Friedrich, and Jessica Ullrich. Tierperspektiven. Berlin, 2009.

MLA (8th ed.) Citation

Weltzien, Friedrich, and Jessica Ullrich. Tierperspektiven. 2009.

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