Society for Visual Education & Erdoes, R. (1984). Chronology of the world: 400-1000 A.D. Society for Visual Education, Inc.
Chicago-viite (17. p.)Society for Visual Education ja Richard Erdoes. Chronology of the World: 400-1000 A.D. Chicago: Society for Visual Education, Inc, 1984.
MLA-viite (9. p.)Society for Visual Education ja Richard Erdoes. Chronology of the World: 400-1000 A.D. Society for Visual Education, Inc, 1984.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.