APA (7th ed.) Citation

Beals, R. L., Hoijer, H., & Beals, A. R. (1977). An introduction to anthropology. Macmillan.

Chicago Style (17th ed.) Citation

Beals, Ralph Leon, Harry Hoijer, and Alan R. Beals. An Introduction to Anthropology. New York: Macmillan, 1977.

MLA (9th ed.) Citation

Beals, Ralph Leon, et al. An Introduction to Anthropology. Macmillan, 1977.