APA aipamena

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

Chicago Style aipamena

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

MLA aipamena

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