Cita APA (7th ed.)

SCHAEFER, R. T. (1986). Sociology.-- Ed.2. McGraw-Hill Book.

Cita Chicago (17th ed.)

SCHAEFER, Richard T. Sociology.-- Ed.2. New York: McGraw-Hill Book, 1986.

Cita MLA (9th ed.)

SCHAEFER, Richard T. Sociology.-- Ed.2. McGraw-Hill Book, 1986.