Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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