APA (7th ed.) Citation

Duwenbeck, R. (2023). Fitness. Friedrich.

Chicago Style (17th ed.) Citation

Duwenbeck, Ralf. Fitness. Hannover: Friedrich, 2023.

MLA (9th ed.) Citation

Duwenbeck, Ralf. Fitness. Friedrich, 2023.

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