DeGarmo, E. P. (1979). Engineering economy. New York: Macmillan Publishing Co, Inc.
Trích dẫn kiểu ChicagoDeGarmo, E. Paul. Engineering Economy. New York: Macmillan Publishing Co, Inc, 1979.
Deismireacht MLADeGarmo, E. Paul. Engineering Economy. New York: Macmillan Publishing Co, Inc, 1979.
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