Roby, G. A. (1976). Mechanical methods of chaparral modification. Washington, D.C. : U.S. Dept. of Agriculture, Forest Service.
Chicago Style (17th ed.) CitationRoby, George A. Mechanical Methods of Chaparral Modification. Washington, D.C. : U.S. Dept. of Agriculture, Forest Service, 1976.
MLA (8th ed.) CitationRoby, George A. Mechanical Methods of Chaparral Modification. Washington, D.C. : U.S. Dept. of Agriculture, Forest Service, 1976.
IICA/CATIE CitationRoby, G. A. 1976. Mechanical methods of chaparral modification. Washington, D.C. : U.S. Dept. of Agriculture, Forest Service.