MLA
Co., E. C. Kropp. Men on a Dock Loading Cotton onto a Cargo Ship, with Carts in the Background [Hand Colored]. 1918. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 68. https://digital.library.emory.edu/purl/317crjdfrf-cor.
APA, 6th edition
Co., E. C. K. (1918). Men on a dock loading cotton onto a cargo ship, with carts in the background [hand colored] (Box 68) [Photographic postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/317crjdfrf-cor.
Chicago
Co., E. C. Kropp. “Men on a Dock Loading Cotton onto a Cargo Ship, with Carts in the Background [Hand Colored].” Photographic postcards. Robert Langmuir African American Photograph Collection, 1918. Box 68. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/317crjdfrf-cor.