Hewes, G. W. (1973). The Origin of Man. Mouton.
Cita Chicago (17th ed.)Hewes, Gordon W. The Origin of Man. The Hague: Mouton, 1973.
Cita MLA (9th ed.)Hewes, Gordon W. The Origin of Man. Mouton, 1973.
Atenció: Aquestes cites poden no estar 100% correctes.