APA (7th ed.) Citation

Great Britain. Dept. of the Environment & Great Britain. Welsh Office. (1971). Improving the environment. H.M.S.O..

Chicago Style (17th ed.) Citation

Great Britain. Dept. of the Environment and Great Britain. Welsh Office. Improving the Environment. London: H.M.S.O., 1971.

MLA (8th ed.) Citation

Great Britain. Dept. of the Environment and Great Britain. Welsh Office. Improving the Environment. H.M.S.O., 1971.