MLA
Johnson, Frank. Men and Boys Unloading Bananas from a Cargo Ship in Key West, Florida, with One Man on a Horse-Drawn Cart [Hand Colored]. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 68. https://digital.library.emory.edu/purl/354xgxd27s-cor.
APA, 6th edition
Johnson, F. Men and boys unloading bananas from a cargo ship in Key West, Florida, with one man on a horse-drawn cart [hand colored] (Box 68) [Photographic postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/354xgxd27s-cor.
Chicago
Johnson, Frank. “Men and Boys Unloading Bananas from a Cargo Ship in Key West, Florida, with One Man on a Horse-Drawn Cart [Hand Colored].” Photographic postcards. Robert Langmuir African American Photograph Collection, n.d. Box 68. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/354xgxd27s-cor.