MLA
Porter, Albert Quincy. Diary by Albert Quincy Porter. Porter Was a Member of the 22nd Mississippi Infantry Regiment. The Diary Is in Two Parts, the First Covering January 20 - July 7, 1864 and the Second Covering February 2 - May 30, 1865 (Typescript). 1864. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 5, Folder 48. https://digital.library.emory.edu/purl/450gtht87d-cor.
APA, 6th edition
Porter, A. Q. (1864). Diary by Albert Quincy Porter. Porter was a member of the 22nd Mississippi Infantry Regiment. The diary is in two parts, the first covering January 20 - July 7, 1864 and the second covering February 2 - May 30, 1865 (typescript) (Box 5, Folder 48) [Diaries]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/450gtht87d-cor.
Chicago
Porter, Albert Quincy. “Diary by Albert Quincy Porter. Porter Was a Member of the 22nd Mississippi Infantry Regiment. The Diary Is in Two Parts, the First Covering January 20 - July 7, 1864 and the Second Covering February 2 - May 30, 1865 (Typescript).” Diaries. Civil War Collection, 1864. Box 5, Folder 48. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/450gtht87d-cor.