MLA
Williams, M. F. Ku Klux Klan, Field Meet, Gettysburg, Pennsylvania, May 30, 1927 [Panorama]. 1927. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box XOP6. https://digital.library.emory.edu/purl/187pnvx0mn-cor.
APA, 6th edition
Williams, M. F. (1927). Ku Klux Klan, Field Meet, Gettysburg, Pennsylvania, May 30, 1927 [panorama] (Box XOP6) [Black-and-white photographs]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/187pnvx0mn-cor.
Chicago
Williams, M. F. “Ku Klux Klan, Field Meet, Gettysburg, Pennsylvania, May 30, 1927 [Panorama].” Black-and-white photographs. Robert Langmuir African American Photograph Collection, 1927. Box XOP6. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/187pnvx0mn-cor.