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शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWest Bengal. Labour, Department of. Labour in West Bengal. The author, 1978.
एमएलए (9वां संस्करण) प्रशस्ति पत्रWest Bengal. Labour, Department of. Labour in West Bengal. The author, 1978.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.