Style de citation APA (7e éd.)

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

Style de citation Chicago (17e éd.)

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

Style de citation MLA (9e éd.)

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