MLA
Lithography., Pendleton's. His Soul Is Marching On, Broadside, No Date. 1848. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 3, Folder 2. https://digital.library.emory.edu/purl/95269p8ffp-cor.
APA, 6th edition
Lithography., P. (1848). His Soul Is Marching On, broadside, no date (Box 3, Folder 2) [Broadsides (notices)]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/95269p8ffp-cor.
Chicago
Lithography., Pendleton's. “His Soul Is Marching On, Broadside, No Date.” Broadsides (notices). William H. Scott Family Papers, 1848-1982, 1848. Box 3, Folder 2. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/95269p8ffp-cor.