MLA
Fellan, J. M. Letter from an J. M. Fellan[?] (Halifax, North Carolina) to Elbert Riddick[?] - July 15, 1861 (Photocopy). 1861. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 10, Folder 1. https://digital.library.emory.edu/purl/344pk0p3qf-cor.
APA, 6th edition
Fellan, J. M. (1861). Letter from an J. M. Fellan[?] (Halifax, North Carolina) to Elbert Riddick[?] - July 15, 1861 (photocopy) (Box 10, Folder 1) [Letters (correspondence)]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/344pk0p3qf-cor.
Chicago
Fellan, J. M. “Letter from an J. M. Fellan[?] (Halifax, North Carolina) to Elbert Riddick[?] - July 15, 1861 (Photocopy).” Letters (correspondence). Civil War Collection, 1861. Box 10, Folder 1. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/344pk0p3qf-cor.