Ball, D. A., & McCulloch, H. W. (1993). International business: Introduction and essentials (5th ed.). Irwin.
Citace podle Chicago (17th ed.)Ball, Donald A., a H. Wendell McCulloch. International Business: Introduction and Essentials. 5th ed. Burr Ridge, Ill: Irwin, 1993.
Citace podle MLA (9th ed.)Ball, Donald A., a H. Wendell McCulloch. International Business: Introduction and Essentials. 5th ed. Irwin, 1993.
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