APA (7th ed.) Citation

Gwartney, J. D., Clark, J. R. . [., & Stroup, R. (1982). Essentials of economics. Academic Press.

Chicago Style (17th ed.) Citation

Gwartney, James D., J. R. [] Clark, and Richard Stroup. Essentials of Economics. New York: Academic Press, 1982.

MLA (9th ed.) Citation

Gwartney, James D., et al. Essentials of Economics. Academic Press, 1982.