MLA
Singletary, Gene. Typed Transcript of Note from Gene Singletary to Casey Hayden. 1961. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 1, Folder 2. https://digital.library.emory.edu/purl/914nk98svz-cor.
APA, 6th edition
Singletary, G. (1961). Typed transcript of note from Gene Singletary to Casey Hayden (Box 1, Folder 2) [Correspondence]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/914nk98svz-cor.
Chicago
Singletary, Gene. “Typed Transcript of Note from Gene Singletary to Casey Hayden.” Correspondence. Joan C. Browning Papers, 1961-2006, 1961. Box 1, Folder 2. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/914nk98svz-cor.