APA (7th ed.) Citation

Guichard, P., Duby, G., & Toubert, P. (1997). Mittelalter. Campus Verlag.

Chicago Style (17th ed.) Citation

Guichard, Pierre, Georges Duby, and Pierre Toubert. Mittelalter. Frankfurt: Campus Verlag, 1997.

MLA (8th ed.) Citation

Guichard, Pierre, et al. Mittelalter. Campus Verlag, 1997.