APA (7th ed.) Citation

Hahn, T., & Werber, N. (2005). Systemtheorie.

Chicago Style (17th ed.) Citation

Hahn, Torsten, and Niels Werber. Systemtheorie. 2005.

MLA (9th ed.) Citation

Hahn, Torsten, and Niels Werber. Systemtheorie. 2005.

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