Davies, D. G. (1967). Fresh water: The precious resource. Natural Press for the American Museum of Natural History.
Citazione stile Chigago Style (17a edizione)Davies, Delwyn G. Fresh Water: The Precious Resource. GArden City, N. Y: Natural Press for the American Museum of Natural History, 1967.
Citatione MLA (9a ed.)Davies, Delwyn G. Fresh Water: The Precious Resource. Natural Press for the American Museum of Natural History, 1967.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.