1. Being Green is your Business;Basche,1998
2. Annual Environmental Report;British Airways,1999
3. British Holiday and Home Parks Association 2000 David Bellamy Conservation Awards. . Viewed 5 February 2001.
4. Special Issue on Ecolabels;Brown;Forum for Applied Research and Public Policy,1997
5. New United States Federal Trade Commission Guidelines for Ecolabeling and Green Advertising;Buckley;Environmental and Planning Law Journal,1992