APA (7th ed.) Citation

Wolfram, v. E., Schröder, W., & Kartschoke, D. (1989). Willehalm. De Gruyter.

Chicago Style (17th ed.) Citation

Wolfram, von Eschenbach, Werner Schröder, and Dieter Kartschoke. Willehalm. Berlin ; New York: De Gruyter, 1989.

MLA (9th ed.) Citation

Wolfram, von Eschenbach, et al. Willehalm. De Gruyter, 1989.