Hill, C. W. L., & Hult, G. T. M. (2019). International business: Competing in the global marketplace (Twelve edition.). McGraw-Hill Education Ann Arbour, Michigan ProQuest.
Lua i Stíl Chicago (17ú heag.)Hill, Charles W. L., agus G Tomas M. Hult. International Business: Competing in the Global Marketplace. Twelve edition. New York, NY: McGraw-Hill Education Ann Arbour, Michigan ProQuest, 2019.
Lua MLA (8ú heag.)Hill, Charles W. L., agus G Tomas M. Hult. International Business: Competing in the Global Marketplace. Twelve edition. McGraw-Hill Education Ann Arbour, Michigan ProQuest, 2019.
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