The following are useful references to the topic.

1. A Guide to Environmental Law in New Zealand - 2nd Edition, Brooker & Friend Ltd for Commission for the Environment, 1984.
2. Environmental Protection and Enhancement Procedures (1981). Commission for the Environment.
3. Environmental Impact Report - Audit Procedure. A guide to "Environmental Protection and Enhancement Procedures" (1981). 1981.
4. Environmental Audits and Appraisals 1976-81. A Review 1983. Commission for the Environment.
5. Shopley, J.B. and Fuggle, R.F. "A Comprehensive Review of Current Environmental Impact Assessment Methods and Techniques". J. Environmental Management 18 pp 25-47. 1984.