Não informado. (1971). American Journal of Public Health. American Public Health Association.
Lua i Stíl Chicago (17ú heag.)Não informado. American Journal of Public Health. Washington: American Public Health Association, 1971.
Lua MLA (8ú heag.)Não informado. American Journal of Public Health. American Public Health Association, 1971.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.