United States. Environmental Protection Agency. (2002). A Collection of solid waste resources (2002 edition.). Environmental Protection Agency.
Cita Chicago (17th ed.)United States. Environmental Protection Agency. A Collection of Solid Waste Resources. 2002 edition. Cincinnati, OH: Environmental Protection Agency, 2002.
Cita MLA (9th ed.)United States. Environmental Protection Agency. A Collection of Solid Waste Resources. 2002 edition. Environmental Protection Agency, 2002.
Atenció: Aquestes cites poden no estar 100% correctes.