(left to right): James Walter Fecker (1891-1945) and Albert Graham Ingalls (1888-1958)

Chicago citation style
Davis, Watson 1896-1967. (left to right): James Walter Fecker (1891-1945) and Albert Graham Ingalls (1888-1958). Retrieved from the Digital Public Library of America, http://collections.si.edu/search/results.htm?q=record_ID%3Asiris_arc_296544&repo=DPLA. (Accessed November 20, 2018.)
APA citation style
Davis, Watson 1896-1967, (left to right): James Walter Fecker (1891-1945) and Albert Graham Ingalls (1888-1958). Retrieved from the Digital Public Library of America, http://collections.si.edu/search/results.htm?q=record_ID%3Asiris_arc_296544&repo=DPLA
MLA citation style
Davis, Watson 1896-1967. Retrieved from the Digital Public Library of America <http://collections.si.edu/search/results.htm?q=record_ID%3Asiris_arc_296544&repo=DPLA>.
Note: These citations are programmatically generated and may be incomplete.