(1991). Biological Substances: International Standards and Reference Reagents. World Health Organization.
Cita Chicago Style (17a ed.)Biological Substances: International Standards and Reference Reagents. Geneva: World Health Organization, 1991.
Cita MLA (9a ed.)Biological Substances: International Standards and Reference Reagents. World Health Organization, 1991.
Precaución: Estas citas no son 100% exactas.