IUCN European Programme. (1997). Fishing for a Living: The Ecology and Economics of Fishponds in Central Europe.
Chicago-referens (17:e uppl.)IUCN European Programme. Fishing for a Living: The Ecology and Economics of Fishponds in Central Europe. 1997.
MLA-referens (9:e uppl.)IUCN European Programme. Fishing for a Living: The Ecology and Economics of Fishponds in Central Europe. 1997.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.