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Gaya APA

krugman, P, R., Obstfeld, M. (2004). Ekonomi Internasional Teori dan Kebijakan Edisi 5 Jilid 1 . Jakarta: Indeks.

Gaya MLA

krugman, Paul, R.., Obstfeld, Maurice. "Ekonomi Internasional Teori dan Kebijakan Edisi 5 Jilid 1". Jakarta: Indeks, 2004. Text.