MLA
African American Man in Front of a Train Backdrop of Pennsylvania Lines Leaving St. Louis Bound for the East. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 75. https://digital.library.emory.edu/purl/631cjsxkwj-cor.
APA, 6th edition
African American man in front of a train backdrop of Pennsylvania Lines leaving St. Louis bound for the East (Box 75). [Photographic postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/631cjsxkwj-cor.
Chicago
“African American Man in Front of a Train Backdrop of Pennsylvania Lines Leaving St. Louis Bound for the East.” Photographic postcards. Robert Langmuir African American Photograph Collection, n.d. Box 75. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/631cjsxkwj-cor.