Suggested guide for weed control 1967.
MLA
United States. Suggested guide for weed control 1967. Washington, D.C. : Agricultural Research Service, U.S. Dept. of Agriculture, 1967.
APA
United States. (1967). Suggested guide for weed control 1967. Washington, D.C. : Agricultural Research Service, U.S. Dept. of Agriculture.
Chicago
United States. Suggested guide for weed control 1967. Washington, D.C. : Agricultural Research Service, U.S. Dept. of Agriculture, 1967.