MLA
Hayes, C. L. A Yard of Caddies : Three African American Boys Sitting on a Wooden Fence. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 74. https://digital.library.emory.edu/purl/583kwh70vt-cor.
APA, 6th edition
Hayes, C. L. A yard of caddies : three African American boys sitting on a wooden fence (Box 74) [Postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/583kwh70vt-cor.
Chicago
Hayes, C. L. “A Yard of Caddies : Three African American Boys Sitting on a Wooden Fence.” Postcards. Robert Langmuir African American Photograph Collection, n.d. Box 74. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/583kwh70vt-cor.