APA (7th ed.) Citation

DeGarmo, E. P. (1973). Engineering economy (5th ed.). Macmillan.

Chicago Style (17th ed.) Citation

DeGarmo, E. Paul. Engineering Economy. 5th ed. New York: Macmillan, 1973.

MLA (9th ed.) Citation

DeGarmo, E. Paul. Engineering Economy. 5th ed. Macmillan, 1973.