Calhoun, C., Light, D., Keller, S., & Harper, D. (2001). Understanding sociology. Glencoe McGraw-Hill.
Cita Chicago (17th ed.)Calhoun, Craig, Donald Light, Suzanne Keller, i Douglas Harper. Understanding Sociology. New York: Glencoe McGraw-Hill, 2001.
Cita MLA (9th ed.)Calhoun, Craig, et al. Understanding Sociology. Glencoe McGraw-Hill, 2001.
Atenció: Aquestes cites poden no estar 100% correctes.