MLA
Souvenir Post Card Co. (N.Y.). Oliver W. Jr., in the harness, Jacksonville, Fla. [hand colored]. May 23, 1907. Robert Langmuir African American Photograph Collection. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/392g79cnrp-cor.
APA, 6th edition
Souvenir Post Card Co. (N.Y.). (May 23, 1907)[Oliver W. Jr., in the harness, Jacksonville, Fla. [hand colored]]. Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/392g79cnrp-cor.
Chicago
Souvenir Post Card Co. (N.Y.), Oliver W. Jr., in the harness, Jacksonville, Fla. [hand colored], May 23, 1907, Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/392g79cnrp-cor.