MLA
Rotograph Co. (New York, N.Y.). Aunt Betsy Holmes and her horseless carriage, Raleigh, N.C. [hand colored]. unknown. Robert Langmuir African American Photograph Collection. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/767wm37pzr-cor.
APA, 6th edition
Rotograph Co. (New York, N.Y.). (unknown)[Aunt Betsy Holmes and her horseless carriage, Raleigh, N.C. [hand colored]]. Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/767wm37pzr-cor.
Chicago
Rotograph Co. (New York, N.Y.), Aunt Betsy Holmes and her horseless carriage, Raleigh, N.C. [hand colored], unknown, Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/767wm37pzr-cor.