Whitson, T. D., & Burrill, L. C. (1991). Weeds of the west. The Western Society of Weed Science in cooperation with the Western United States Land Grant Universities Cooperative Extension Services.
Chicago Style (17th ed.) CitationWhitson, Tom D., and Larry C. Burrill. Weeds of the West. [Laramie?]: The Western Society of Weed Science in cooperation with the Western United States Land Grant Universities Cooperative Extension Services, 1991.
MLA (9th ed.) CitationWhitson, Tom D., and Larry C. Burrill. Weeds of the West. The Western Society of Weed Science in cooperation with the Western United States Land Grant Universities Cooperative Extension Services, 1991.
Warning: These citations may not always be 100% accurate.