Xanthium strumarium L

Chicago citation style
Xanthium strumarium L. 21 Aug 1922. Retrieved from the Digital Public Library of America, http://collections.si.edu/search/results.htm?q=record_ID%3Anmnhbotany_12993705&repo=DPLA. (Accessed November 15, 2018.)
APA citation style
(21 Aug 1922) Xanthium strumarium L. Retrieved from the Digital Public Library of America, http://collections.si.edu/search/results.htm?q=record_ID%3Anmnhbotany_12993705&repo=DPLA
MLA citation style
Retrieved from the Digital Public Library of America <http://collections.si.edu/search/results.htm?q=record_ID%3Anmnhbotany_12993705&repo=DPLA>.
Note: These citations are programmatically generated and may be incomplete.