L to R: Mrs. Margaret Brock, Unknown (Color)

Chicago citation style
L to R: Mrs. Margaret Brock, Unknown (Color). Retrieved from the Digital Public Library of America, http://cdm15730.contentdm.oclc.org/cdm/ref/collection/p15730coll17/id/2227. (Accessed December 12, 2018.)
APA citation style
L to R: Mrs. Margaret Brock, Unknown (Color). Retrieved from the Digital Public Library of America, http://cdm15730.contentdm.oclc.org/cdm/ref/collection/p15730coll17/id/2227
MLA citation style
Retrieved from the Digital Public Library of America <http://cdm15730.contentdm.oclc.org/cdm/ref/collection/p15730coll17/id/2227>.
Note: These citations are programmatically generated and may be incomplete.