Não informado. (1973). Bulletin of the Pan American Health Organization. Pan American Health Organization.
Lua i Stíl Chicago (17ú heag.)Não informado. Bulletin of the Pan American Health Organization. Washington: Pan American Health Organization, 1973.
Lua MLA (8ú heag.)Não informado. Bulletin of the Pan American Health Organization. Pan American Health Organization, 1973.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.