MLA
An African American Letter Carrier Holding Letters, with a Mail Bag over His Shoulder. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 29. https://digital.library.emory.edu/purl/600ns1rnf1-cor.
APA, 6th edition
An African American Letter carrier holding letters, with a mail bag over his shoulder (Box 29). [Card photographs (photographs)]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/600ns1rnf1-cor.
Chicago
“An African American Letter Carrier Holding Letters, with a Mail Bag over His Shoulder.” Card photographs (photographs). Robert Langmuir African American Photograph Collection, n.d. Box 29. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/600ns1rnf1-cor.