Viola rockiana W. Becker

Chicago citation style
Viola rockiana W. Becker. May 1922. Retrieved from the Digital Public Library of America, http://collections.si.edu/search/results.htm?q=record_ID%3Anmnhbotany_2152706&repo=DPLA. (Accessed December 19, 2018.)
APA citation style
(May 1922) Viola rockiana W. Becker. Retrieved from the Digital Public Library of America, http://collections.si.edu/search/results.htm?q=record_ID%3Anmnhbotany_2152706&repo=DPLA
MLA citation style
Retrieved from the Digital Public Library of America <http://collections.si.edu/search/results.htm?q=record_ID%3Anmnhbotany_2152706&repo=DPLA>.
Note: These citations are programmatically generated and may be incomplete.