Cita APA (7th ed.)

Schaefer, R. T., & Lamm, R. P. (1997). Sociology--a brief introduction (2nd ed.). McGraw-Hill Companies.

Cita Chicago (17th ed.)

Schaefer, Richard T., i Robert P. Lamm. Sociology--a Brief Introduction. 2nd ed. New York: McGraw-Hill Companies, 1997.

Cita MLA (8th ed.)

Schaefer, Richard T., i Robert P. Lamm. Sociology--a Brief Introduction. 2nd ed. McGraw-Hill Companies, 1997.