APA-referens (7:e uppl.)
Ford, J. A. (1969). A comparison of formative cultures in the Americas: Diffusion or the psychic unity of man. Smithsonian Institution Press.
Chicago-referens (17:e uppl.)
Ford, James Alfred. A Comparison of Formative Cultures in the Americas: Diffusion or the Psychic Unity of Man. Washington: Smithsonian Institution Press, 1969.
MLA-referens (9:e uppl.)
Ford, James Alfred. A Comparison of Formative Cultures in the Americas: Diffusion or the Psychic Unity of Man. Smithsonian Institution Press, 1969.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.