MLA
Edmondson, J. H. Telegram from Captain J. H. Edmondson to Brigadier General Daniel Ruggles - June 18, 1862. 1862. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 6, Folder 6. https://digital.library.emory.edu/purl/494vhhmhf1-cor.
APA, 6th edition
Edmondson, J. H. (1862). Telegram from Captain J. H. Edmondson to Brigadier General Daniel Ruggles - June 18, 1862 (Box 6, Folder 6) [Telegrams]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/494vhhmhf1-cor.
Chicago
Edmondson, J. H. “Telegram from Captain J. H. Edmondson to Brigadier General Daniel Ruggles - June 18, 1862.” Telegrams. Civil War Collection, 1862. Box 6, Folder 6. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/494vhhmhf1-cor.