Não informado. (1958). Journal of Environmental Engineering. Society of Environmental Engineers.
Lua i Stíl Chicago (17ú heag.)Não informado. Journal of Environmental Engineering. Los Angeles, Calif: Society of Environmental Engineers, 1958.
Lua MLA (8ú heag.)Não informado. Journal of Environmental Engineering. Society of Environmental Engineers, 1958.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.