OSTWALD, P. F. (1974). Cost Estimating For Engineering And Management Phillip F. Ostwald. Prentice Hall.
Chicago (17e ed.) BronvermeldingOSTWALD, Phillip F. Cost Estimating For Engineering And Management Phillip F. Ostwald. Prentice Hall, 1974.
MLA (8e ed.) BronvermeldingOSTWALD, Phillip F. Cost Estimating For Engineering And Management Phillip F. Ostwald. Prentice Hall, 1974.
Let op: Deze citaties zijn niet altijd 100% accuraat.