APA (7th ed.) Citation

Curtis, A. B. (2003). Horse Rock Ridge Research Natural Area. U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Research Station.

Chicago Style (17th ed.) Citation

Curtis, Alan B. Horse Rock Ridge Research Natural Area. Portland, OR: U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Research Station, 2003.

MLA (9th ed.) Citation

Curtis, Alan B. Horse Rock Ridge Research Natural Area. U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Research Station, 2003.