NEWNAN, D. G. (1991). Solution Manual Engineering Economic Analysis. Binarupa Aksara.
Lua i Stíl Chicago (17ú heag.)NEWNAN, Donald G. Solution Manual Engineering Economic Analysis. Binarupa Aksara, 1991.
Lua MLA (8ú heag.)NEWNAN, Donald G. Solution Manual Engineering Economic Analysis. Binarupa Aksara, 1991.
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