Bick, H. (1972). Ciliated protozoa: An illustrated guide to the species used as biological indicators in freshwater biology. World Health Organization.
Citação norma ChicagoBick, Hartmut. Ciliated Protozoa: An Illustrated Guide to the Species Used as Biological Indicators in Freshwater Biology. Geneva: World Health Organization, 1972.
Citação norma MLABick, Hartmut. Ciliated Protozoa: An Illustrated Guide to the Species Used as Biological Indicators in Freshwater Biology. World Health Organization, 1972.
Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.