W. L. Hill Charles. (1997). International Business Competing in the Global Marketplace (In lần thứ 1.). American: Higher Education Group.
Chicago-tyylinen lähdeviittausW. L. Hill Charles. International Business Competing in the Global Marketplace. In lần thứ 1. American: Higher Education Group, 1997.
MLA-viiteW. L. Hill Charles. International Business Competing in the Global Marketplace. In lần thứ 1. American: Higher Education Group, 1997.
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