(1991). Biological Substances: International Standards and Reference Reagents. World Health Organization.
Cita Chicago (17th ed.)Biological Substances: International Standards and Reference Reagents. Geneva: World Health Organization, 1991.
Cita MLA (9th ed.)Biological Substances: International Standards and Reference Reagents. World Health Organization, 1991.
Atenció: Aquestes cites poden no estar 100% correctes.