Não informado. (1991). Aquatic Conservation: Marine and freshwater ecosystems. John Wiley & Sons.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Aquatic Conservation: Marine and Freshwater Ecosystems. Chichester, Inglaterra: John Wiley & Sons, 1991.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Aquatic Conservation: Marine and Freshwater Ecosystems. John Wiley & Sons, 1991.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.