(1990). Selected annotated bibliography on essential drugs (1 ed.). World Health organization.
Cita Chicago (17th ed.)Selected Annotated Bibliography on Essential Drugs. 1 ed. Washington: World Health organization, 1990.
Cita MLA (9th ed.)Selected Annotated Bibliography on Essential Drugs. 1 ed. World Health organization, 1990.
Atenció: Aquestes cites poden no estar 100% correctes.