Cita APA (7a ed.)

Bell, R. R. (1981). Contemporary social problems. Dorsey [u.a.].

Cita Chicago Style (17a ed.)

Bell, Robert R. Contemporary Social Problems. Homewood, Ill. [u.a.]: Dorsey [u.a.], 1981.

Cita MLA (9a ed.)

Bell, Robert R. Contemporary Social Problems. Dorsey [u.a.], 1981.