APA (7th ed.) Citation

Lefferts, W., Soifer, I., Cutright, P., & Jarolimek, J. (1978). The old world. Macmillan.

Chicago Style (17th ed.) Citation

Lefferts, Walter, Israel Soifer, Prudence Cutright, and John Jarolimek. The Old World. New York: Macmillan, 1978.

MLA (9th ed.) Citation

Lefferts, Walter, et al. The Old World. Macmillan, 1978.