APA (7th ed.) Citation

L.Huisman. (1974). Slow sand filtration. World Health Organization.

Chicago Style (17th ed.) Citation

L.Huisman. Slow Sand Filtration. World Health Organization, 1974.

MLA (8th ed.) Citation

L.Huisman. Slow Sand Filtration. World Health Organization, 1974.

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