Cita APA (7a ed.)
Wills, F. R. (1982). World Civilizations: From ancient times through the sixteenth century. D.C. Hearth and Company.
Cita Chicago Style (17a ed.)
Wills, F. Roy. World Civilizations: From Ancient Times Through the Sixteenth Century. Lexington, Massachusetts: D.C. Hearth and Company, 1982.
Cita MLA (9a ed.)
Wills, F. Roy. World Civilizations: From Ancient Times Through the Sixteenth Century. D.C. Hearth and Company, 1982.
Precaución: Estas citas no son 100% exactas.