MLA
Oath of Allegiance to the United States, Signed by M. MacMaster (Charleston, South Carolina). 1865. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 5, Folder 9. https://digital.library.emory.edu/purl/10966t1h3n-cor.
APA, 6th edition
Oath of allegiance to the United States, signed by M. MacMaster (Charleston, South Carolina) (Box 5, Folder 9). (1865). [Testimonies]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/10966t1h3n-cor.
Chicago
“Oath of Allegiance to the United States, Signed by M. MacMaster (Charleston, South Carolina).” Testimonies. Civil War Collection, 1865. Box 5, Folder 9. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/10966t1h3n-cor.