Não informado. (1946). Occupational Medicine. American Medical Association.
Lua i Stíl Chicago (17ú heag.)Não informado. Occupational Medicine. Chicago, Ill: American Medical Association, 1946.
Lua MLA (8ú heag.)Não informado. Occupational Medicine. American Medical Association, 1946.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.