APA način citiranja (7. izdanje)

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

Čikaški stil citiranja (17. izdanje)

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

MLA način citiranja (9. izdanje)

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