Centaurea sp

Chicago citation style
Centaurea sp. 26 May 1907. Retrieved from the Digital Public Library of America, http://collections.si.edu/search/results.htm?q=record_ID%3Anmnhbotany_13045517&repo=DPLA. (Accessed November 17, 2018.)
APA citation style
(26 May 1907) Centaurea sp. Retrieved from the Digital Public Library of America, http://collections.si.edu/search/results.htm?q=record_ID%3Anmnhbotany_13045517&repo=DPLA
MLA citation style
Retrieved from the Digital Public Library of America <http://collections.si.edu/search/results.htm?q=record_ID%3Anmnhbotany_13045517&repo=DPLA>.
Note: These citations are programmatically generated and may be incomplete.