Cita APA

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

Citación estilo Chicago

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

Cita MLA

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