Não informado. (1930). National Institute of Health bulletin. U.S. Public Health Service.
Lua i Stíl Chicago (17ú heag.)Não informado. National Institute of Health Bulletin. Washington: U.S. Public Health Service, 1930.
Lua MLA (8ú heag.)Não informado. National Institute of Health Bulletin. U.S. Public Health Service, 1930.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.