Lua APA (7ú heag.)

APPLEYARD DENNIS R. (2006). INTERNATIONAL ECONOMICS (5TH.). MCGRAW-HILL.

Lua i Stíl Chicago (17ú heag.)

APPLEYARD DENNIS R. INTERNATIONAL ECONOMICS. 5TH. BOSTON: MCGRAW-HILL, 2006.

Lua MLA (9ú heag.)

APPLEYARD DENNIS R. INTERNATIONAL ECONOMICS. 5TH. MCGRAW-HILL, 2006.

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