APA (7th ed.) Citation

Great Britain. Department of the Environment & Great Britain. Welsh Office. (1989). Guidance on safeguarding the quality of public water supplies. H.M.S.O..

Chicago Style (17th ed.) Citation

Great Britain. Department of the Environment and Great Britain. Welsh Office. Guidance on Safeguarding the Quality of Public Water Supplies. London: H.M.S.O., 1989.

MLA (9th ed.) Citation

Great Britain. Department of the Environment and Great Britain. Welsh Office. Guidance on Safeguarding the Quality of Public Water Supplies. H.M.S.O., 1989.

Warning: These citations may not always be 100% accurate.