Society for Visual Education & Erdoes, R. (1984). Chronology of the western world: The twentieth century. Society for Visual Education, Inc.
Citazione stile Chigago Style (17a edizione)Society for Visual Education e Richard Erdoes. Chronology of the Western World: The Twentieth Century. Chicago: Society for Visual Education, Inc, 1984.
Citatione MLA (9a ed.)Society for Visual Education e Richard Erdoes. Chronology of the Western World: The Twentieth Century. Society for Visual Education, Inc, 1984.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.