Não informado. (1971). Environmental Health Review. Canadian Institute of Public Health Inspectors.
Lua i Stíl Chicago (17ú heag.)Não informado. Environmental Health Review. Ontario, Canada: Canadian Institute of Public Health Inspectors, 1971.
Lua MLA (8ú heag.)Não informado. Environmental Health Review. Canadian Institute of Public Health Inspectors, 1971.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.