(2000). Freshwater ecoregions of North America: A conservation assessment. Island press.
Cita Chicago (17th ed.)Freshwater Ecoregions of North America: A Conservation Assessment. Washington, D.C: Island press, 2000.
Cita MLA (9th ed.)Freshwater Ecoregions of North America: A Conservation Assessment. Island press, 2000.
Atenció: Aquestes cites poden no estar 100% correctes.