Pescod, M., Abouzaid, H., & Sundaresan, B. (1980). Slow sand filtration: A low cost treatment for water supplies in developing countries. Published for the World Health Organization's Regional Office for Europe by the Water Research Centre, UK.
Παραπομπή σε μορφή Chicago (17η εκδ.)Pescod, M.B, H. Abouzaid, και B.B Sundaresan. Slow Sand Filtration: A Low Cost Treatment for Water Supplies in Developing Countries. Marlow, Bucks: Published for the World Health Organization's Regional Office for Europe by the Water Research Centre, UK, 1980.
Παραπομπή σε μορφή MLA (9th εκδ.)Pescod, M.B, et al. Slow Sand Filtration: A Low Cost Treatment for Water Supplies in Developing Countries. Published for the World Health Organization's Regional Office for Europe by the Water Research Centre, UK, 1980.