APA aipamena

United Kingdom. Dept. of the Environment. (1989). Environment in trust. HMSO.

Chicago Style aipamena

United Kingdom. Dept. of the Environment. Environment in Trust. United Kingdom: HMSO, 1989.

MLA aipamena

United Kingdom. Dept. of the Environment. Environment in Trust. HMSO, 1989.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.