APA (7th ed.) Citation

Files, R. T., & Oliver, D. A. (1981). Naturalist notes. Forest Service, U.S. Dept. of Agriculture.

Chicago Style (17th ed.) Citation

Files, Roscoe T., and Don A. Oliver. Naturalist Notes. [Washington, D.C.?]: Forest Service, U.S. Dept. of Agriculture, 1981.

MLA (9th ed.) Citation

Files, Roscoe T., and Don A. Oliver. Naturalist Notes. Forest Service, U.S. Dept. of Agriculture, 1981.