APA

United States, . (2009). Development of estimated quantitation levels for the second six-year review of national primary drinking water regulations. [Washington, D.C.]: United States Environmental Protection Agency, Office of Water.

Chicago

United States, . 2009. Development of estimated quantitation levels for the second six-year review of national primary drinking water regulations. [Washington, D.C.]: United States Environmental Protection Agency, Office of Water.

Harvard

United States, . (2009). Development of estimated quantitation levels for the second six-year review of national primary drinking water regulations. [Washington, D.C.]: United States Environmental Protection Agency, Office of Water.

MLA

United States, . Development of estimated quantitation levels for the second six-year review of national primary drinking water regulations. [Washington, D.C.]: United States Environmental Protection Agency, Office of Water. 2009.