Cita APA (7a ed.)

Gallup, G. H. (1944). A guide to public opinion polls. Princeton University Press.

Cita Chicago Style (17a ed.)

Gallup, George Horace. A Guide to Public Opinion Polls. Princeton: Princeton University Press, 1944.

Cita MLA (9a ed.)

Gallup, George Horace. A Guide to Public Opinion Polls. Princeton University Press, 1944.