APA (7 वां संस्करण) प्रशस्ति पत्र

Singh, R. (2002). Economic environment of business: A case study approach.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

Singh, Rakesh. Economic Environment of Business: A Case Study Approach. New Delhi, 2002.

एमएलए (9वां संस्करण) प्रशस्ति पत्र

Singh, Rakesh. Economic Environment of Business: A Case Study Approach. 2002.

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