Dyfyniad APA

Newnan, D. G. (1991). Engineering economic analysis (4th ed.). Engineering Press.

Dyfyniad Arddull Chicago

Newnan, Donald G. Engineering Economic Analysis. 4th ed. San Jose, CA: Engineering Press, 1991.

Dyfyniad MLA

Newnan, Donald G. Engineering Economic Analysis. 4th ed. Engineering Press, 1991.

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