APA (7th ed.) Citation

World Health Organization. (1971). International standards for drinking-water (3d ed.). [publisher not identified].

Chicago Style (17th ed.) Citation

World Health Organization. International Standards for Drinking-water. 3d ed. Geneva: [publisher not identified], 1971.

MLA (9th ed.) Citation

World Health Organization. International Standards for Drinking-water. 3d ed. [publisher not identified], 1971.