Dyfyniad APA

National Environmental Protection Council. (1978). Primer on the EIS system. The Council.

Dyfyniad Arddull Chicago

National Environmental Protection Council. Primer on the EIS System. Makati, Metro Manila: The Council, 1978.

Dyfyniad MLA

National Environmental Protection Council. Primer on the EIS System. The Council, 1978.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.