MLA
Parker, Martha E., and other citizens. Letter to the Commander of Union Troops in Union City [Tennessee] Signed by Martha E. Parker and Other Citizens for the Release from Service of William A. Finch - December 1863. 1863. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 19, Folder 12. https://digital.library.emory.edu/purl/679573n71j-cor.
APA, 6th edition
Parker, M. E., & other citizens. (1863). Letter to the commander of Union troops in Union City [Tennessee] signed by Martha E. Parker and other citizens for the release from service of William A. Finch - December 1863. (Box 19, Folder 12) [Letters (correspondence)]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/679573n71j-cor.
Chicago
Parker, Martha E., and other citizens. “Letter to the Commander of Union Troops in Union City [Tennessee] Signed by Martha E. Parker and Other Citizens for the Release from Service of William A. Finch - December 1863.” Letters (correspondence). Civil War Collection, 1863. Box 19, Folder 12. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/679573n71j-cor.