APA Citation

Weed Science Society of America, & Weed Science Society of America. (1989). Composite list of weeds. Champaign, Ill.: Weed Science Society of America.

Chicago Style Citation

Weed Science Society of America, and Weed Science Society of America. Composite List of Weeds. Champaign, Ill.: Weed Science Society of America, 1989.

MLA Citation

Weed Science Society of America, and Weed Science Society of America. Composite List of Weeds. Champaign, Ill.: Weed Science Society of America, 1989.

Warning: These citations may not always be 100% accurate.