Lua APA (7ú heag.)

(1992). Engineering Cost Estimating / Phillip F. Ostwald. Printice Hall.

Lua i Stíl Chicago (17ú heag.)

Engineering Cost Estimating / Phillip F. Ostwald. Printice Hall, 1992.

Lua MLA (8ú heag.)

Engineering Cost Estimating / Phillip F. Ostwald. Printice Hall, 1992.

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