Cita APA (7th ed.)

DOWNS, J. F., & Bleibtreu, H. K. (1969). Human variation: An introduction to physical anthropology. Glencoe.

Cita Chicago (17th ed.)

DOWNS, James F., i Herman K. Bleibtreu. Human Variation: An Introduction to Physical Anthropology. California: Glencoe, 1969.

Cita MLA (9th ed.)

DOWNS, James F., i Herman K. Bleibtreu. Human Variation: An Introduction to Physical Anthropology. Glencoe, 1969.