Carduus nutans L

Chicago citation style
Carduus nutans L. 28 Jul 1974. Retrieved from the Digital Public Library of America, http://collections.si.edu/search/results.htm?q=record_ID%3Anmnhbotany_12972102&repo=DPLA. (Accessed December 15, 2018.)
APA citation style
(28 Jul 1974) Carduus nutans L. Retrieved from the Digital Public Library of America, http://collections.si.edu/search/results.htm?q=record_ID%3Anmnhbotany_12972102&repo=DPLA
MLA citation style
Retrieved from the Digital Public Library of America <http://collections.si.edu/search/results.htm?q=record_ID%3Anmnhbotany_12972102&repo=DPLA>.
Note: These citations are programmatically generated and may be incomplete.