Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (8a ed.)

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