APA način citiranja (7. izdanje)

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

Čikaški stil citiranja (17. izdanje)

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

MLA način citiranja (8. izdanje)

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