APA (7th ed.) Citation

Pater, D. E. (1998). Ecoregions of western Washington and Oregon. U.S. Dept., of the Interior, U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Pater, David E. Ecoregions of Western Washington and Oregon. Reston, Va.: U.S. Dept., of the Interior, U.S. Geological Survey, 1998.

MLA (9th ed.) Citation

Pater, David E. Ecoregions of Western Washington and Oregon. U.S. Dept., of the Interior, U.S. Geological Survey, 1998.