APA ציטוט

DeGarmo,E.Paul. (1979). Engineering economy (6th.ed.). Macmillan.

Chicago Style (17th ed.) Citation

DeGarmo,E.Paul. Engineering Economy. 6th.ed. New York: Macmillan, 1979.

ציטוט MLA

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