MLA
Krebbs, S. H., and Co. Hauling Cotton by Mono-Rail in Memphis, Tenn. [Hand Colored]. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 68. https://digital.library.emory.edu/purl/600ns1rncr-cor.
APA, 6th edition
Krebbs, S. H., & C. Hauling cotton by mono-rail in Memphis, Tenn. [hand colored] (Box 68) [Photographic postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/600ns1rncr-cor.
Chicago
Krebbs, S. H., and Co. “Hauling Cotton by Mono-Rail in Memphis, Tenn. [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/600ns1rncr-cor.