PARK CHAN S. (1990). ADVANCE ENGINEERING ECONOMICS. JOHN WILEY AND SONS.
Lua i Stíl Chicago (17ú heag.)PARK CHAN S. ADVANCE ENGINEERING ECONOMICS. JOHN WILEY AND SONS, 1990.
Lua MLA (9ú heag.)PARK CHAN S. ADVANCE ENGINEERING ECONOMICS. JOHN WILEY AND SONS, 1990.
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