Williams, H. S. (1907). The historians' history of the world: A comprehensive narrative of the rise and development of nations from the earliest times as recorded by over two thousand of the great writers of all ages. Encyclopaedia britannica.

Williams, Henry Smith. The Historians' History of the World: A Comprehensive Narrative of the Rise and Development of Nations from the Earliest Times as Recorded by over Two Thousand of the Great Writers of All Ages. London, New York: Encyclopaedia britannica, 1907.

Williams, Henry Smith. The Historians' History of the World: A Comprehensive Narrative of the Rise and Development of Nations from the Earliest Times as Recorded by over Two Thousand of the Great Writers of All Ages. Encyclopaedia britannica, 1907.