MLA
Buss, Martin J. Summary of Events of May 25-28, 1969 Document - Exhibit XXIV, Letter from Professor Martin J. Buss Regarding Student Unrest. 1969. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 2, Folder 23. https://digital.library.emory.edu/purl/699n2z35nk-cor.
APA, 6th edition
Buss, M. J. (1969). Summary of Events of May 25-28, 1969 document - Exhibit XXIV, Letter from Professor Martin J. Buss regarding student unrest (Box 2, Folder 23) [Letters (correspondence)]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/699n2z35nk-cor.
Chicago
Buss, Martin J. “Summary of Events of May 25-28, 1969 Document - Exhibit XXIV, Letter from Professor Martin J. Buss Regarding Student Unrest.” Letters (correspondence). Emory University Desegregation Collection, 1969. Box 2, Folder 23. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/699n2z35nk-cor.