APA (7th ed.) Citation

Stumpf, E. A. (2011). Willi Pfefferle.

Chicago Style (17th ed.) Citation

Stumpf, Egon A. Willi Pfefferle. 2011.

MLA (9th ed.) Citation

Stumpf, Egon A. Willi Pfefferle. 2011.

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