(1993). Ecology and environment in India. Library of Congress Office ; Library of Congress Photoduplication Service.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रEcology and Environment in India. New Delhi : Washington, D.C.: Library of Congress Office ; Library of Congress Photoduplication Service, 1993.
एमएलए (8वां संस्करण) प्रशस्ति पत्रEcology and Environment in India. Library of Congress Office ; Library of Congress Photoduplication Service, 1993.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.