MLA
Co., Paul C. Koeber. A Soft Snap [Hand Colored]. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 68. https://digital.library.emory.edu/purl/5053ffbgbj-cor.
APA, 6th edition
Co., P. C. K. A soft snap [hand colored] (Box 68) [Photographic postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/5053ffbgbj-cor.
Chicago
Co., Paul C. Koeber. “A Soft Snap [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/5053ffbgbj-cor.