MLA
Hall, Zach W. History of Integration at Emory, 1966, Section I - A Brief Documentary Account of The Integration of Emory University - Letter from Zach W. Hall to Emory President, Sidney Walter Martin, Relating Incidents Occurring during the Gathering of Signatures for a Petition Urging the Integration of Emory University. 1961. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 1, Folder 4. https://digital.library.emory.edu/purl/054kkwh7sr-cor.
APA, 6th edition
Hall, Z. W. (1961). History of integration at Emory, 1966, Section I - A Brief Documentary Account of The Integration of Emory University - Letter from Zach W. Hall to Emory president, Sidney Walter Martin, relating incidents occurring during the gathering of signatures for a petition urging the integration of Emory University (Box 1, Folder 4) [Letters (correspondence)]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/054kkwh7sr-cor.
Chicago
Hall, Zach W. “History of Integration at Emory, 1966, Section I - A Brief Documentary Account of The Integration of Emory University - Letter from Zach W. Hall to Emory President, Sidney Walter Martin, Relating Incidents Occurring during the Gathering of Signatures for a Petition Urging the Integration of Emory University.” Letters (correspondence). Emory University Desegregation Collection, 1961. Box 1, Folder 4. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/054kkwh7sr-cor.