Easton, S. C. (1971). A survey of ancient, medieval and modern history. National Bookstore.
Cita Chicago (17th ed.)Easton, Stewart Copinger. A Survey of Ancient, Medieval and Modern History. Manila: National Bookstore, 1971.
Cita MLA (9th ed.)Easton, Stewart Copinger. A Survey of Ancient, Medieval and Modern History. National Bookstore, 1971.
Atenció: Aquestes cites poden no estar 100% correctes.