MLA
Howe, F. L. An Altercation in Coonville : Two African American Boys Fighting with a Group Watching. 1905. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 74. https://digital.library.emory.edu/purl/8021c59zzs-cor.
APA, 6th edition
Howe, F. L. (1905). An altercation in coonville : two African American boys fighting with a group watching (Box 74) [Postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/8021c59zzs-cor.
Chicago
Howe, F. L. “An Altercation in Coonville : Two African American Boys Fighting with a Group Watching.” Postcards. Robert Langmuir African American Photograph Collection, 1905. Box 74. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/8021c59zzs-cor.