Chanlett, E. T. (1973). Enviromental Protection/ Emil T. Chanlett. McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)Chanlett, Emil T. Enviromental Protection/ Emil T. Chanlett. McGraw-Hill, 1973.
Lua MLA (8ú heag.)Chanlett, Emil T. Enviromental Protection/ Emil T. Chanlett. McGraw-Hill, 1973.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.