OSTWALD, P. F. (1974). Cost Estimating For Engineering And Management Phillip F. Ostwald. Prentice Hall.
Chicago-viite (17. p.)OSTWALD, Phillip F. Cost Estimating For Engineering And Management Phillip F. Ostwald. Prentice Hall, 1974.
MLA-viite (8. p.)OSTWALD, Phillip F. Cost Estimating For Engineering And Management Phillip F. Ostwald. Prentice Hall, 1974.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.