APA (7th ed.) Citation

Appel, I., Hermes, G., & Wahl, R. (2008). Mensch - Staat - Umwelt. Duncker & Humblot.

Chicago Style (17th ed.) Citation

Appel, Ivo, Georg Hermes, and Rainer Wahl. Mensch - Staat - Umwelt. Berlin: Duncker & Humblot, 2008.

MLA (9th ed.) Citation

Appel, Ivo, et al. Mensch - Staat - Umwelt. Duncker & Humblot, 2008.