APA (7th ed.) Citation

Wilson, L. F. (1991). Pine spittlebug: Its ecology and management. U.S. Dept. of Agriculture, Forest Service.

Chicago Style (17th ed.) Citation

Wilson, Louis F. Pine Spittlebug: Its Ecology and Management. [Washington, D.C.?]: U.S. Dept. of Agriculture, Forest Service, 1991.

MLA (9th ed.) Citation

Wilson, Louis F. Pine Spittlebug: Its Ecology and Management. U.S. Dept. of Agriculture, Forest Service, 1991.