APA (7th ed.) Citation

Johnson, R. L. (1985). Sweetgum ([Rev. Jul. 1985].). Forest Service, U.S. Dept. of Agriculture.

Chicago Style (17th ed.) Citation

Johnson, R. L. Sweetgum. [Rev. Jul. 1985]. [Washington, D.C.?]: Forest Service, U.S. Dept. of Agriculture, 1985.

MLA (9th ed.) Citation

Johnson, R. L. Sweetgum. [Rev. Jul. 1985]. Forest Service, U.S. Dept. of Agriculture, 1985.