Dixon, T., & Terence Dixon and Martin Lucas. (1983). The Human Race. McGraw-HIll.
Cita Chicago (17th ed.)Dixon, Terence, i Terence Dixon and Martin Lucas. The Human Race. New York: McGraw-HIll, 1983.
Cita MLA (9th ed.)Dixon, Terence, i Terence Dixon and Martin Lucas. The Human Race. McGraw-HIll, 1983.
Atenció: Aquestes cites poden no estar 100% correctes.