Cita APA

Sybel, H. v., & Duff Gordon, L. (1861). The history and literature of the Crusades. Chapman and Hall.

Citación estilo Chicago

Sybel, Heinrich von, and Lucie Duff Gordon. The History and Literature of the Crusades. London: Chapman and Hall, 1861.

Cita MLA

Sybel, Heinrich von, and Lucie Duff Gordon. The History and Literature of the Crusades. Chapman and Hall, 1861.