Cita APA (7a ed.)
(1981). World health statistics annual 1980-1981: Infectious diseases: causes. World Health Organization.
Cita Chicago Style (17a ed.)
World Health Statistics Annual 1980-1981: Infectious Diseases: Causes. Genéve: World Health Organization, 1981.
Cita MLA (9a ed.)
World Health Statistics Annual 1980-1981: Infectious Diseases: Causes. World Health Organization, 1981.
Precaución: Estas citas no son 100% exactas.