APA (7th ed.) Citation

Bux, P., & Kraskopf, P. (2020). 1990,-. Verlag Kettler.

Chicago Style (17th ed.) Citation

Bux, Peter, and Peter Kraskopf. 1990,-. Dortmund: Verlag Kettler, 2020.

MLA (9th ed.) Citation

Bux, Peter, and Peter Kraskopf. 1990,-. Verlag Kettler, 2020.

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