(left to right): Frederica Annis Lopez de Leo de Laguna (1906-2004) and Kaj Birket-Smith (1893-1977)

Chicago citation style
Davis, Fremont 1915-1977. (left to right): Frederica Annis Lopez de Leo de Laguna (1906-2004) and Kaj Birket-Smith (1893-1977). March 18, 1937. Retrieved from the Digital Public Library of America, http://collections.si.edu/search/results.htm?q=record_ID%3Asiris_arc_296511&repo=DPLA. (Accessed November 14, 2018.)
APA citation style
Davis, Fremont 1915-1977, (March 18, 1937) (left to right): Frederica Annis Lopez de Leo de Laguna (1906-2004) and Kaj Birket-Smith (1893-1977). Retrieved from the Digital Public Library of America, http://collections.si.edu/search/results.htm?q=record_ID%3Asiris_arc_296511&repo=DPLA
MLA citation style
Davis, Fremont 1915-1977. Retrieved from the Digital Public Library of America <http://collections.si.edu/search/results.htm?q=record_ID%3Asiris_arc_296511&repo=DPLA>.
Note: These citations are programmatically generated and may be incomplete.