Society for Visual Education & Erdoes, R. (1984). Chronology of the western world, 400-1000 A.D. The Society [production company].
Lua i Stíl Chicago (17ú heag.)Society for Visual Education agus Richard Erdoes. Chronology of the Western World, 400-1000 A.D. Chicago, Ill: The Society [production company], 1984.
Lua MLA (9ú heag.)Society for Visual Education agus Richard Erdoes. Chronology of the Western World, 400-1000 A.D. The Society [production company], 1984.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.