Tohutoro APA (7th ed.)

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

Tohutoru Kātū Chicago

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

Tohutoro MLA

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