APA (7th ed.) Citation

Great Britain. Dept. of the Environment & Great Britain. Welsh Office. (1971). Report of a river pollution survey of England and Wales 1970. H.M.S.O..

Chicago Style (17th ed.) Citation

Great Britain. Dept. of the Environment and Great Britain. Welsh Office. Report of a River Pollution Survey of England and Wales 1970. London: H.M.S.O., 1971.

MLA (8th ed.) Citation

Great Britain. Dept. of the Environment and Great Britain. Welsh Office. Report of a River Pollution Survey of England and Wales 1970. H.M.S.O., 1971.