Cita APA (7th ed.)
Greaves, R. L. (1990). Civilizations of the world: The human adventure. Harper & Row, Publishers.
Cita Chicago (17th ed.)
Greaves, Richard L. Civilizations of the World: The Human Adventure. New York: Harper & Row, Publishers, 1990.
Cita MLA (9th ed.)
Greaves, Richard L. Civilizations of the World: The Human Adventure. Harper & Row, Publishers, 1990.
Atenció: Aquestes cites poden no estar 100% correctes.