MLA
Wright, Marcus J. (Marcus Joseph), 1831-1922. Letters from General Marcus J. Wright (Washington, D.C.) to General William E. Mickle, regarding distribution of various reports, etc. relating to the United Confederate Veterans organization - October 28, 1911. October 28, 1911. Civil War Collection. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/668x95x7dw-cor.
APA, 6th edition
Wright, Marcus J. (Marcus Joseph), 1831-1922. (October 28, 1911)[Letters from General Marcus J. Wright (Washington, D.C.) to General William E. Mickle, regarding distribution of various reports, etc. relating to the United Confederate Veterans organization - October 28, 1911]. Civil War Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/668x95x7dw-cor.
Chicago
Wright, Marcus J. (Marcus Joseph), 1831-1922, Letters from General Marcus J. Wright (Washington, D.C.) to General William E. Mickle, regarding distribution of various reports, etc. relating to the United Confederate Veterans organization - October 28, 1911, October 28, 1911, Civil War Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/668x95x7dw-cor.