APA (7th ed.) Citation

Detering, H. (2011). Vorwort. Der rote Wunderschirm.

Chicago Style (17th ed.) Citation

Detering, Heinrich. "Vorwort." Der Rote Wunderschirm 2011.

MLA (8th ed.) Citation

Detering, Heinrich. "Vorwort." Der Rote Wunderschirm, 2011.

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