APA (7th ed.) Citation

Brütsch, E., Nussbaumer, M., & Sitta, H. (1990). Negation. Groos.

Chicago Style (17th ed.) Citation

Brütsch, Edgar, Markus Nussbaumer, and Horst Sitta. Negation. Heidelberg: Groos, 1990.

MLA (9th ed.) Citation

Brütsch, Edgar, et al. Negation. Groos, 1990.