TRIVEDI P R. (2000). ENCYCLOPEDIA OF ENVIRONMENTAL,POLLUTION,PLANNING AND CONSERVATION SET OF SIX VOLUMES. A.P.H.PUBLISHING CORPORATION.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रTRIVEDI P R. ENCYCLOPEDIA OF ENVIRONMENTAL,POLLUTION,PLANNING AND CONSERVATION SET OF SIX VOLUMES. NEW DELHI: A.P.H.PUBLISHING CORPORATION, 2000.
एमएलए (9वां संस्करण) प्रशस्ति पत्रTRIVEDI P R. ENCYCLOPEDIA OF ENVIRONMENTAL,POLLUTION,PLANNING AND CONSERVATION SET OF SIX VOLUMES. A.P.H.PUBLISHING CORPORATION, 2000.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.