Cita APA (7th ed.)

(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.