Great Britain. Dept. of the Environment & Great Britain. Welsh Office. (1975). River pollution survey of England and Wales, updated 1973: River quality and discharges of sewage and industrial effluents. H.M.S.O..
Citazione stile Chigago Style (17a edizione)Great Britain. Dept. of the Environment e Great Britain. Welsh Office. River Pollution Survey of England and Wales, Updated 1973: River Quality and Discharges of Sewage and Industrial Effluents. London: H.M.S.O., 1975.
Citatione MLA (8a ed.)Great Britain. Dept. of the Environment e Great Britain. Welsh Office. River Pollution Survey of England and Wales, Updated 1973: River Quality and Discharges of Sewage and Industrial Effluents. H.M.S.O., 1975.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.