APA (7th ed.) Citation

Steffen, S. (2011). So schafft man das!

Chicago Style (17th ed.) Citation

Steffen, Sonja. So Schafft Man Das! 2011.

MLA (8th ed.) Citation

Steffen, Sonja. So Schafft Man Das! 2011.

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