MLA
Confederate Navy Cipher Used during War by Lieutenant William H. Murdaugh. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 2, Folder 31. https://digital.library.emory.edu/purl/798mcvdpd8-cor.
APA, 6th edition
Confederate Navy cipher used during war by Lieutenant William H. Murdaugh (Box 2, Folder 31). [Ciphers (codes)]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/798mcvdpd8-cor.
Chicago
“Confederate Navy Cipher Used during War by Lieutenant William H. Murdaugh.” Ciphers (codes). Civil War Collection, n.d. Box 2, Folder 31. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/798mcvdpd8-cor.