Adams, W. E., & Barlow, R. B. (1968). The Western world. Harper & Row.
Cita Chicago (17th ed.)Adams, Wallace E., i Richard B. Barlow. The Western World. New York: Harper & Row, 1968.
Cita MLA (9th ed.)Adams, Wallace E., i Richard B. Barlow. The Western World. Harper & Row, 1968.
Atenció: Aquestes cites poden no estar 100% correctes.