APA (7th ed.) Citation

Froning, R., & Wülker, L. (1910). Das Mittelalter. Kesselring.

Chicago Style (17th ed.) Citation

Froning, Richard, and Ludwig Wülker. Das Mittelalter. Leipzig [u.a.]: Kesselring, 1910.

MLA (9th ed.) Citation

Froning, Richard, and Ludwig Wülker. Das Mittelalter. Kesselring, 1910.