MLA
Two African American Men in Suits Posing, One Sitting in a Chair. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 61. https://digital.library.emory.edu/purl/310jsxksqb-cor.
APA, 6th edition
Two African American men in suits posing, one sitting in a chair (Box 61). [Card photographs (photographs)]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/310jsxksqb-cor.
Chicago
“Two African American Men in Suits Posing, One Sitting in a Chair.” Card photographs (photographs). Robert Langmuir African American Photograph Collection, n.d. Box 61. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/310jsxksqb-cor.