Carduus sp

Chicago citation style
Carduus sp. 15 Aug 1912. Retrieved from the Digital Public Library of America, http://collections.si.edu/search/results.htm?q=record_ID%3Anmnhbotany_12977175&repo=DPLA. (Accessed November 12, 2018.)
APA citation style
(15 Aug 1912) Carduus sp. Retrieved from the Digital Public Library of America, http://collections.si.edu/search/results.htm?q=record_ID%3Anmnhbotany_12977175&repo=DPLA
MLA citation style
Retrieved from the Digital Public Library of America <http://collections.si.edu/search/results.htm?q=record_ID%3Anmnhbotany_12977175&repo=DPLA>.
Note: These citations are programmatically generated and may be incomplete.