NEWMAN, D. G. (1990). Engineering Economic Analysis Donald G. Newman. Bibarupa Aksara.
Lua i Stíl Chicago (17ú heag.)NEWMAN, Donald G. Engineering Economic Analysis Donald G. Newman. Bibarupa Aksara, 1990.
Lua MLA (8ú heag.)NEWMAN, Donald G. Engineering Economic Analysis Donald G. Newman. Bibarupa Aksara, 1990.
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