Cita APA (7a ed.)
Downs, J. F., & Bleibtreu, H. K. (1972). Human variation: An introduction to physical anthropology. Glencoe press.
Cita Chicago Style (17a ed.)
Downs, James F., y Hermann K. Bleibtreu. Human Variation: An Introduction to Physical Anthropology. California: Glencoe press, 1972.
Cita MLA (9a ed.)
Downs, James F., y Hermann K. Bleibtreu. Human Variation: An Introduction to Physical Anthropology. Glencoe press, 1972.
Precaución: Estas citas no son 100% exactas.