APA (7th ed.) Citation

NSF International (Organization) & American National Standards Institute. (2012). Residential wastewater treatment systems. NSF International.

Chicago Style (17th ed.) Citation

NSF International (Organization) and American National Standards Institute. Residential Wastewater Treatment Systems. Ann Arbor, Michigan: NSF International, 2012.

MLA (9th ed.) Citation

NSF International (Organization) and American National Standards Institute. Residential Wastewater Treatment Systems. NSF International, 2012.