MLA
McClure, R. L. Helps to Make Kentucky Famous : Men Wearing Hats, Cooking Burgoo, a Spicy Stew, in a Large Pot in Kentucky. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 70. https://digital.library.emory.edu/purl/576rxwdbxj-cor.
APA, 6th edition
McClure, R. L. Helps to make Kentucky famous : men wearing hats, cooking burgoo, a spicy stew, in a large pot in Kentucky (Box 70) [Photographic postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/576rxwdbxj-cor.
Chicago
McClure, R. L. “Helps to Make Kentucky Famous : Men Wearing Hats, Cooking Burgoo, a Spicy Stew, in a Large Pot in Kentucky.” Photographic postcards. Robert Langmuir African American Photograph Collection, n.d. Box 70. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/576rxwdbxj-cor.