United States. Environmental Protection Agency. (2005). Site characterization library: Version 3.0. Environmental Protection Agency.
Cita Chicago (17th ed.)United States. Environmental Protection Agency. Site Characterization Library: Version 3.0. Cincinnati, OH: Environmental Protection Agency, 2005.
Cita MLA (9th ed.)United States. Environmental Protection Agency. Site Characterization Library: Version 3.0. Environmental Protection Agency, 2005.
Atenció: Aquestes cites poden no estar 100% correctes.