BALL, D. A. (1985). International Business Introduction And Essentials Donald A. Ball And Wendel H. Mcculloch. Business Publications.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रBALL, Donald A. International Business Introduction And Essentials Donald A. Ball And Wendel H. Mcculloch. Business Publications, 1985.
एमएलए (8वां संस्करण) प्रशस्ति पत्रBALL, Donald A. International Business Introduction And Essentials Donald A. Ball And Wendel H. Mcculloch. Business Publications, 1985.
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