Bick, H. (1972). Ciliated protozoa: An illustrated guide to the species used as biological indicators in freshwater biology. World Health Organization.
Citação do estilo Chicago (17ª ed.)Bick, Hartmut. Ciliated Protozoa: An Illustrated Guide to the Species Used as Biological Indicators in Freshwater Biology. Geneva: World Health Organization, 1972.
Citação MLA (9ª ed.)Bick, 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.