MLA
Obituary for Mrs. Mary Ann McCord (1815-1840), Apparently the Mother of John and James McCord. 1840. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 5, Folder 2. https://digital.library.emory.edu/purl/252j6q584m-cor.
APA, 6th edition
Obituary for Mrs. Mary Ann McCord (1815-1840), apparently the mother of John and James McCord (Box 5, Folder 2). (1840). [Obituaries]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/252j6q584m-cor.
Chicago
“Obituary for Mrs. Mary Ann McCord (1815-1840), Apparently the Mother of John and James McCord.” Obituaries. Civil War Collection, 1840. Box 5, Folder 2. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/252j6q584m-cor.