OSTWALD, P. F. (1974). Cost Estimating For Engineering And Management Phillip F. Ostwald. Prentice Hall.
Lua i Stíl Chicago (17ú heag.)OSTWALD, Phillip F. Cost Estimating For Engineering And Management Phillip F. Ostwald. Prentice Hall, 1974.
Lua MLA (8ú heag.)OSTWALD, Phillip F. Cost Estimating For Engineering And Management Phillip F. Ostwald. Prentice Hall, 1974.
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