MLA
Pennington, George W. Diary of George W. Pennington from August 1862 to September 1864, with the Diary Ending Four Days before His Death at Andersonville Prison. Pennington Was a Member of the 141st Pennsylvania Infantry Regiment. Additionally, There Are a Number of Letters Written to Members of His Family (Photocopy). 1862. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 20, Folder 9. https://digital.library.emory.edu/purl/460qrfj7v7-cor.
APA, 6th edition
Pennington, G. W. (1862). Diary of George W. Pennington from August 1862 to September 1864, with the diary ending four days before his death at Andersonville prison. Pennington was a member of the 141st Pennsylvania Infantry Regiment. Additionally, there are a number of letters written to members of his family (photocopy) (Box 20, Folder 9) [Diaries]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/460qrfj7v7-cor.
Chicago
Pennington, George W. “Diary of George W. Pennington from August 1862 to September 1864, with the Diary Ending Four Days before His Death at Andersonville Prison. Pennington Was a Member of the 141st Pennsylvania Infantry Regiment. Additionally, There Are a Number of Letters Written to Members of His Family (Photocopy).” Diaries. Civil War Collection, 1862. Box 20, Folder 9. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/460qrfj7v7-cor.