Sybel, H. v., & Duff Gordon, L. (1861). The history and literature of the Crusades. Chapman and Hall.
Lua i Stíl Chicago (17ú heag.)Sybel, Heinrich von, agus Lucie Duff Gordon. The History and Literature of the Crusades. London: Chapman and Hall, 1861.
Lua MLA (8ú heag.)Sybel, Heinrich von, agus Lucie Duff Gordon. The History and Literature of the Crusades. Chapman and Hall, 1861.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.