APA (7th ed.) Citation

Lloyd, B., Helmer, R., & World Health Organization. (1991). Surveillance of drinking water quality in rural areas / Barry Lloyd, Richard Helmer. Longman Scientific & Technical on behalf of the World Health Organization and the United Nations Environment Programme.

Chicago Style (17th ed.) Citation

Lloyd, Barry, Richard Helmer, and World Health Organization. Surveillance of Drinking Water Quality in Rural Areas / Barry Lloyd, Richard Helmer. Harlow: Longman Scientific & Technical on behalf of the World Health Organization and the United Nations Environment Programme, 1991.

MLA (9th ed.) Citation

Lloyd, Barry, et al. Surveillance of Drinking Water Quality in Rural Areas / Barry Lloyd, Richard Helmer. Longman Scientific & Technical on behalf of the World Health Organization and the United Nations Environment Programme, 1991.

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