Não informado. (1972). Environmental Health Perspectives. National Institute of Environmenatl Health Sciences.
Lua i Stíl Chicago (17ú heag.)Não informado. Environmental Health Perspectives. Research Triangle Park, NC: National Institute of Environmenatl Health Sciences, 1972.
Lua MLA (8ú heag.)Não informado. Environmental Health Perspectives. National Institute of Environmenatl Health Sciences, 1972.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.