APA (7th ed.) Citation

Okun, D. A., & Ernst, W. R. (1987). Community piped water supply systems in developing countries : a planning manual / Daniel A. Okun and Walter R. Ernst: A planning manual. World Bank.

Chicago Style (17th ed.) Citation

Okun, Daniel A., and Walter R. Ernst. Community Piped Water Supply Systems in Developing Countries : A Planning Manual / Daniel A. Okun and Walter R. Ernst: A Planning Manual. Washington, D.C.: World Bank, 1987.

MLA (9th ed.) Citation

Okun, Daniel A., and Walter R. Ernst. Community Piped Water Supply Systems in Developing Countries : A Planning Manual / Daniel A. Okun and Walter R. Ernst: A Planning Manual. World Bank, 1987.

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