Cita APA (7th ed.)

(1991). Biological substances: International standards and reference reagents, 1990. World Health Organization.

Cita Chicago (17th ed.)

Biological Substances: International Standards and Reference Reagents, 1990. Geneva: World Health Organization, 1991.

Cita MLA (9th ed.)

Biological Substances: International Standards and Reference Reagents, 1990. World Health Organization, 1991.