Não informado. (1977). Health and Hygiene. Royal Institute of Public Health and Hygiene.
Lua i Stíl Chicago (17ú heag.)Não informado. Health and Hygiene. London: Royal Institute of Public Health and Hygiene, 1977.
Lua MLA (8ú heag.)Não informado. Health and Hygiene. Royal Institute of Public Health and Hygiene, 1977.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.