Cita APA (7th ed.)
Schaefer, R. T., & Lamm, R. P. (1989). Sociology (3rd ed.). McGraw-Hill.
Cita Chicago (17th ed.)
Schaefer, Richard T., i Robert P. Lamm. Sociology. 3rd ed. New York: McGraw-Hill, 1989.
Cita MLA (9th ed.)
Schaefer, Richard T., i Robert P. Lamm. Sociology. 3rd ed. McGraw-Hill, 1989.
Atenció: Aquestes cites poden no estar 100% correctes.