APA (7th ed.) Citation

DeGarmo, E. P., Canada, J. R., & Sullivan, W. G. (1979). Engineering economy (6th ed.). Macmillan.

Chicago Style (17th ed.) Citation

DeGarmo, E. Paul, John R. Canada, and William G. Sullivan. Engineering Economy. 6th ed. New York: Macmillan, 1979.

MLA (9th ed.) Citation

DeGarmo, E. Paul, et al. Engineering Economy. 6th ed. Macmillan, 1979.