MLA
Strauss. An African American Man Wearing a Suit and Hat, and a Woman Wearing a Dress and Hat, Standing on Either Side of a Cement Wall. 1891. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 61. https://digital.library.emory.edu/purl/627zkh18d0-cor.
APA, 6th edition
S. (1891). An African American man wearing a suit and hat, and a woman wearing a dress and hat, standing on either side of a cement wall (Box 61) [Card photographs (photographs)]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/627zkh18d0-cor.
Chicago
Strauss. “An African American Man Wearing a Suit and Hat, and a Woman Wearing a Dress and Hat, Standing on Either Side of a Cement Wall.” Card photographs (photographs). Robert Langmuir African American Photograph Collection, 1891. Box 61. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/627zkh18d0-cor.