MLA
Elton & Co. (Washington, D.C.). Stuart A. Martin, age 1 year 8 months and 8 days. October 11, 1894. Robert Langmuir African American Photograph Collection. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/228ncjsxpf-cor.
APA, 6th edition
Elton & Co. (Washington, D.C.). (October 11, 1894)[Stuart A. Martin, age 1 year 8 months and 8 days]. Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/228ncjsxpf-cor.
Chicago
Elton & Co. (Washington, D.C.), Stuart A. Martin, age 1 year 8 months and 8 days, October 11, 1894, Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/228ncjsxpf-cor.