Ostwald, P. F. (1974). Cost estimating for engineering and management. Prentice-Hall.
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Dyfyniad Arddull Chicago
Ostwald, Phillip F. Cost Estimating for Engineering and Management. Englewood Cliffs, N.J.: Prentice-Hall, 1974.
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Dyfyniad MLA
Ostwald, Phillip F. Cost Estimating for Engineering and Management. Prentice-Hall, 1974.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.