Sand, P. F. (1990). Witchweed research and control in the United States. Weed Science Society of America.
Chicago Style (17th ed.) CitationSand, Paul F. Witchweed Research and Control in the United States. Champaign, IL: Weed Science Society of America, 1990.
MLA (9th ed.) CitationSand, Paul F. Witchweed Research and Control in the United States. Weed Science Society of America, 1990.
Warning: These citations may not always be 100% accurate.