Justin Paul. (2018). Business Environment (4th ed.). Mc Graw Hill Education.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रJustin Paul. Business Environment. 4th ed. Mc Graw Hill Education, 2018.
एमएलए (8वां संस्करण) प्रशस्ति पत्रJustin Paul. Business Environment. 4th ed. Mc Graw Hill Education, 2018.
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