Cita APA (7th ed.)

Free, L. A., & Cantril Hadley. (1967). The political beliefs of Americans: A study of public opinion. Rutgers University Press.

Cita Chicago (17th ed.)

Free, Lloyd A., i Cantril Hadley. The Political Beliefs of Americans: A Study of Public Opinion. New Brunswick, N.J: Rutgers University Press, 1967.

Cita MLA (9th ed.)

Free, Lloyd A., i Cantril Hadley. The Political Beliefs of Americans: A Study of Public Opinion. Rutgers University Press, 1967.