Guzzardo, J. J. (1989). Textual history and the Divine comedy. Scripta Humanistica.
Lua i Stíl Chicago (17ú heag.)Guzzardo, John J. Textual History and the Divine Comedy. Potomac, Md., U.S.A.: Scripta Humanistica, 1989.
Lua MLA (9ú heag.)Guzzardo, John J. Textual History and the Divine Comedy. Scripta Humanistica, 1989.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.