Lua APA (7ú heag.)

PUGEL THOMAS A. (2007). INTERNATIONAL ECONOMICS (13TH.). MCGRAW HILL IRWIN.

Lua i Stíl Chicago (17ú heag.)

PUGEL THOMAS A. INTERNATIONAL ECONOMICS. 13TH. BOSTON: MCGRAW HILL IRWIN, 2007.

Lua MLA (9ú heag.)

PUGEL THOMAS A. INTERNATIONAL ECONOMICS. 13TH. MCGRAW HILL IRWIN, 2007.

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