Cita APA (7th ed.)
Benstein, P., & Green, R. W. (1976). History of civilization. Littlefield.
Cita Chicago (17th ed.)
Benstein, Paul, i Robert W. Green. History of Civilization. New Jersey: Littlefield, 1976.
Cita MLA (9th ed.)
Benstein, Paul, i Robert W. Green. History of Civilization. Littlefield, 1976.
Atenció: Aquestes cites poden no estar 100% correctes.