World Health Organization. (1990). WHO expert committee on biological standardization. World Health Organization.
Chicago-tyylinen lähdeviittausWorld Health Organization. WHO Expert Committee on Biological Standardization. Geneva: World Health Organization, 1990.
MLA-viiteWorld Health Organization. WHO Expert Committee on Biological Standardization. World Health Organization, 1990.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.