Wadebridge Ecological Centre. (1979). The ecologist. Ecosystems Ltd. ; Distributed in North America by the MIT Press.
Chicago-čujuhus (17. p.)Wadebridge Ecological Centre. The Ecologist. Wadebridge, Cornwall, UK : Cambridge, MA: Ecosystems Ltd. ; Distributed in North America by the MIT Press, 1979.
MLA-čujuhus (9. p.)Wadebridge Ecological Centre. The Ecologist. Ecosystems Ltd. ; Distributed in North America by the MIT Press, 1979.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.