MLA
East, Ernest E. Note about Isaac Vermillion Reynolds by Ernest E. East of the Illinois State Archives. 1930. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 5, Folder 59. https://digital.library.emory.edu/purl/2257d7wn5q-cor.
APA, 6th edition
East, E. E. (1930). Note about Isaac Vermillion Reynolds by Ernest E. East of the Illinois State Archives (Box 5, Folder 59) [Notes]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/2257d7wn5q-cor.
Chicago
East, Ernest E. “Note about Isaac Vermillion Reynolds by Ernest E. East of the Illinois State Archives.” Notes. Civil War Collection, 1930. Box 5, Folder 59. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/2257d7wn5q-cor.