APA (7th ed.) Citation

DeGarmo, E. P., Canada, J. R., & Sullivan, W. G. (1979). Engineering economy. Macmillan.

Chicago Style (17th ed.) Citation

DeGarmo, Ernest Paul, John R. Canada, and William G. Sullivan. Engineering Economy. New York: Macmillan, 1979.

MLA (9th ed.) Citation

DeGarmo, Ernest Paul, et al. Engineering Economy. Macmillan, 1979.