MLA
Volunteer, A. 600,000 More. S. Brainard & Co., 1862. Stuart A. Rose Manuscript, Archives, and Rare Book Library, OP35, Folder 12. https://digital.library.emory.edu/purl/105s7h45rh-cor.
APA, 6th edition
Volunteer, A. (1862). 600,000 More (OP35, Folder 12) [Sheet music]. S. Brainard & Co.; Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/105s7h45rh-cor.
Chicago
Volunteer, A. “600,000 More.” Sheet music. Civil War Collection. Cleveland, OH: S. Brainard & Co., 1862. OP35, Folder 12. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/105s7h45rh-cor.