Não informado. (1881). Public health bulletin. U.S. Public Health Service.
Lua i Stíl Chicago (17ú heag.)Não informado. Public Health Bulletin. Washington: U.S. Public Health Service, 1881.
Lua MLA (8ú heag.)Não informado. Public Health Bulletin. U.S. Public Health Service, 1881.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.