NELLIS JOSEPH G. (1997). ESSENCE OF THE ECONOMY (2ND.). PRENTICE -HALL INTERNATIONAL, INC.
Lua i Stíl Chicago (17ú heag.)NELLIS JOSEPH G. ESSENCE OF THE ECONOMY. 2ND. NEW DELHI: PRENTICE -HALL INTERNATIONAL, INC, 1997.
Lua MLA (9ú heag.)NELLIS JOSEPH G. ESSENCE OF THE ECONOMY. 2ND. PRENTICE -HALL INTERNATIONAL, INC, 1997.
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