Não informado. (1978). Cost Engineering. American Association of Cost Engineers.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Cost Engineering. Morgantown, Wa. Va: American Association of Cost Engineers, 1978.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Cost Engineering. American Association of Cost Engineers, 1978.
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