MLA
Wrenn, W. C., and King. A Water Melon Feast [Hand Colored]. 1914. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 69. https://digital.library.emory.edu/purl/542n5tb2v2-cor.
APA, 6th edition
Wrenn, W. C., & K. (1914). A water melon feast [hand colored] (Box 69) [Photographic postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/542n5tb2v2-cor.
Chicago
Wrenn, W. C., and King. “A Water Melon Feast [Hand Colored].” Photographic postcards. Robert Langmuir African American Photograph Collection, 1914. Box 69. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/542n5tb2v2-cor.