Needle, D. (2009). Business in Context - 4th Ed. Cengage Learning.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNeedle, David. Business in Context - 4th Ed. London: Cengage Learning, 2009.
एमएलए (9वां संस्करण) प्रशस्ति पत्रNeedle, David. Business in Context - 4th Ed. Cengage Learning, 2009.
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