Não informado. (1991). Aquatic Conservation: Marine and freshwater ecosystems. John Wiley & Sons.
Chicago-referens (17:e uppl.)Não informado. Aquatic Conservation: Marine and Freshwater Ecosystems. Chichester, Inglaterra: John Wiley & Sons, 1991.
MLA-referens (8:e uppl.)Não informado. Aquatic Conservation: Marine and Freshwater Ecosystems. John Wiley & Sons, 1991.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.