APA (7th ed.) Citation

Gallup, G. H. (2018). The Religious Faiths of the American People, from George Gallup, American Institute of Public Opinion (December 9, 1944). A guide to the religions in America, 237.

Chicago Style (17th ed.) Citation

Gallup, George Horace. "The Religious Faiths of the American People, from George Gallup, American Institute of Public Opinion (December 9, 1944)." A Guide to the Religions in America 2018: 237.

MLA (8th ed.) Citation

Gallup, George Horace. "The Religious Faiths of the American People, from George Gallup, American Institute of Public Opinion (December 9, 1944)." A Guide to the Religions in America, 2018, p. 237.