APA

Gallup G. H., . (1972). The sophisticated poll watcher's guide. [Princeton, N.J.]: Princeton Opinion Press.

Chicago

Gallup George Horace, . 1972. The sophisticated poll watcher's guide. [Princeton, N.J.]: Princeton Opinion Press.

Harvard

Gallup G. H., . (1972). The sophisticated poll watcher's guide. [Princeton, N.J.]: Princeton Opinion Press.

MLA

Gallup George Horace, . The sophisticated poll watcher's guide. [Princeton, N.J.]: Princeton Opinion Press. 1972.