Populus nigra L

Chicago citation style
Populus nigra L. 22 May 1848. Retrieved from the Digital Public Library of America, http://collections.si.edu/search/results.htm?q=record_ID%3Anmnhbotany_10195726&repo=DPLA. (Accessed November 21, 2018.)
APA citation style
(22 May 1848) Populus nigra L. Retrieved from the Digital Public Library of America, http://collections.si.edu/search/results.htm?q=record_ID%3Anmnhbotany_10195726&repo=DPLA
MLA citation style
Retrieved from the Digital Public Library of America <http://collections.si.edu/search/results.htm?q=record_ID%3Anmnhbotany_10195726&repo=DPLA>.
Note: These citations are programmatically generated and may be incomplete.