Lua APA (7ú heag.)

NELLIS JOSEPH G. (1997). ESSENCE OF THE ECONOMY. PRENTICE -HALL INTERNATIONAL; INC.

Lua i Stíl Chicago (17ú heag.)

NELLIS JOSEPH G. ESSENCE OF THE ECONOMY. NEW JERSEY;USA: PRENTICE -HALL INTERNATIONAL; INC, 1997.

Lua MLA (9ú heag.)

NELLIS JOSEPH G. ESSENCE OF THE ECONOMY. PRENTICE -HALL INTERNATIONAL; INC, 1997.

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