MLA
Welborn, Mell B. Biographical Information on William Wesley Welborn. 1960. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 7, Folder 17. https://digital.library.emory.edu/purl/310jsxktp2-cor.
APA, 6th edition
Welborn, M. B. (1960). Biographical information on William Wesley Welborn (Box 7, Folder 17) [Biography (general genre)]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/310jsxktp2-cor.
Chicago
Welborn, Mell B. “Biographical Information on William Wesley Welborn.” Biography (general genre). Civil War Collection, 1960. Box 7, Folder 17. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/310jsxktp2-cor.