Cita APA (7a ed.)

Bick, H. (1972). Ciliated protozoa: An Illustrated Guide to the Species Used as Biological Indicators in Freshwater Biology. World health organization.

Cita Chicago Style (17a ed.)

Bick, Hartmut. Ciliated Protozoa: An Illustrated Guide to the Species Used as Biological Indicators in Freshwater Biology. Geneva: World health organization, 1972.

Cita MLA (8a ed.)

Bick, Hartmut. Ciliated Protozoa: An Illustrated Guide to the Species Used as Biological Indicators in Freshwater Biology. World health organization, 1972.