APA (7th ed.) Citation

British Standards Institution. (1991). Water quality (2nd ed.). British Standards Institution.

Chicago Style (17th ed.) Citation

British Standards Institution. Water Quality. 2nd ed. Milton Keynes, England: British Standards Institution, 1991.

MLA (8th ed.) Citation

British Standards Institution. Water Quality. 2nd ed. British Standards Institution, 1991.

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