World Health Organization. (1989). WORLD health organization: : publications catalogue 1948- 1989. World Health Organization.
Cita Chicago Style (17a ed.)World Health Organization. WORLD Health Organization: : Publications Catalogue 1948- 1989. World Health Organization, 1989.
Cita MLA (9a ed.)World Health Organization. WORLD Health Organization: : Publications Catalogue 1948- 1989. World Health Organization, 1989.
Precaución: Estas citas no son 100% exactas.