MLA
Harris, Martin. A Group of Men and Women, in Suits and Dresses Standing in a Queue. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 39. https://digital.library.emory.edu/purl/3246q573sb-cor.
APA, 6th edition
Harris, M. A group of men and women, in suits and dresses standing in a queue (Box 39) [Black-and-white photographs]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/3246q573sb-cor.
Chicago
Harris, Martin. “A Group of Men and Women, in Suits and Dresses Standing in a Queue.” Black-and-white photographs. Robert Langmuir African American Photograph Collection, n.d. Box 39. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/3246q573sb-cor.