APA (7th ed.) Citation

Alig, R. J., & Butler, B. J. (2004). Area changes for forest cover types in the United States, 1952 to 1997, with projections to 2050. U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Research Station.

Chicago Style (17th ed.) Citation

Alig, Ralph J., and Brett J. Butler. Area Changes for Forest Cover Types in the United States, 1952 to 1997, with Projections to 2050. [Portland, Or.]: U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Research Station, 2004.

MLA (9th ed.) Citation

Alig, Ralph J., and Brett J. Butler. Area Changes for Forest Cover Types in the United States, 1952 to 1997, with Projections to 2050. U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Research Station, 2004.