Cita APA

Key, V. O. (1961). Public opinion and American democracy ([1st ed.].). Knopf.

Citación estilo Chicago

Key, V. O. Public Opinion and American Democracy. [1st ed.]. New York: Knopf, 1961.

Cita MLA

Key, V. O. Public Opinion and American Democracy. [1st ed.]. Knopf, 1961.