Smith, G. W. (1973). Engineering economy: Analysis of capital expenditures (2nd ed.). Iowa State University Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSmith, Gerald W. Engineering Economy: Analysis of Capital Expenditures. 2nd ed. Ames: Iowa State University Press, 1973.
एमएलए (9वां संस्करण) प्रशस्ति पत्रSmith, Gerald W. Engineering Economy: Analysis of Capital Expenditures. 2nd ed. Iowa State University Press, 1973.
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