APA (7th ed.) Citation

Okun, D., & Ponghis, G. (1975). Community wastewater collection and disposal. World Health Organization.

Chicago Style (17th ed.) Citation

Okun, Daniel, and George Ponghis. Community Wastewater Collection and Disposal. Geneva: World Health Organization, 1975.

MLA (9th ed.) Citation

Okun, Daniel, and George Ponghis. Community Wastewater Collection and Disposal. World Health Organization, 1975.

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