APA (7th ed.) Citation

Haverkamp, A., Braun, H., & Mortimer, R. (1988). Medieval Germany, 1056-1273. University Press.

Chicago Style (17th ed.) Citation

Haverkamp, Alfred, Helga Braun, and Richard Mortimer. Medieval Germany, 1056-1273. Oxford [etc.]: University Press, 1988.

MLA (9th ed.) Citation

Haverkamp, Alfred, et al. Medieval Germany, 1056-1273. University Press, 1988.