United Nations Economic Commission for Europe. (1981). Environmental Impact Assessment. ELSEVIER.
Lua i Stíl Chicago (17ú heag.)United Nations Economic Commission for Europe. Environmental Impact Assessment. ELSEVIER, 1981.
Lua MLA (8ú heag.)United Nations Economic Commission for Europe. Environmental Impact Assessment. ELSEVIER, 1981.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.