United States. Environmental Protection Agency. (2005). Site characterization library: Version 3.0. Environmental Protection Agency.
Citazione stile Chigago Style (17a edizione)United States. Environmental Protection Agency. Site Characterization Library: Version 3.0. Cincinnati, OH: Environmental Protection Agency, 2005.
Citatione MLA (9a ed.)United States. Environmental Protection Agency. Site Characterization Library: Version 3.0. Environmental Protection Agency, 2005.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.