Riggs, J. L. (1982). Engineering economics (2nd ed.). McGraw-Hill.
Cita Chicago Style (17a ed.)Riggs, James L. Engineering Economics. 2nd ed. New York: McGraw-Hill, 1982.
Cita MLA (9a ed.)Riggs, James L. Engineering Economics. 2nd ed. McGraw-Hill, 1982.
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