Weltgesundheitsorganisation. (1973). WHO offset publication. WHO.
Cita Chicago Style (17a ed.)Weltgesundheitsorganisation. WHO Offset Publication. Geneva: WHO, 1973.
Cita MLA (8a ed.)Weltgesundheitsorganisation. WHO Offset Publication. WHO, 1973.
Precaución: Estas citas no son 100% exactas.