APA (7th ed.) Citation

Gallup, G. H. (1944). A guide to public opinion polls (2. printing.). Princeton Univ. Press.

Chicago Style (17th ed.) Citation

Gallup, George Horace. A Guide to Public Opinion Polls. 2. printing. Princeton: Princeton Univ. Press, 1944.

MLA (9th ed.) Citation

Gallup, George Horace. A Guide to Public Opinion Polls. 2. printing. Princeton Univ. Press, 1944.