National Environmental Protection Council. (1978). Primer on the EIS system. The Council.
Lua i Stíl Chicago (17ú heag.)National Environmental Protection Council. Primer on the EIS System. Makati, Metro Manila: The Council, 1978.
Lua MLA (9ú heag.)National Environmental Protection Council. Primer on the EIS System. The Council, 1978.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.