William Dwight Whitney

Chicago citation style
George C. Phelps, active c. 1870. William Dwight Whitney. 1869 or 1870. Retrieved from the Digital Public Library of America, http://collections.si.edu/search/results.htm?q=record_ID%3Anpg_NPG.78.172&repo=DPLA. (Accessed December 13, 2018.)
APA citation style
George C. Phelps, active c. 1870, (1869 or 1870) William Dwight Whitney. Retrieved from the Digital Public Library of America, http://collections.si.edu/search/results.htm?q=record_ID%3Anpg_NPG.78.172&repo=DPLA
MLA citation style
George C. Phelps, active c. 1870. Retrieved from the Digital Public Library of America <http://collections.si.edu/search/results.htm?q=record_ID%3Anpg_NPG.78.172&repo=DPLA>.
Note: These citations are programmatically generated and may be incomplete.