MLA
Postage Stamp (Photocopy). Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 4, Folder 50. https://digital.library.emory.edu/purl/576rxwdcts-cor.
APA, 6th edition
Postage stamp (photocopy) (Box 4, Folder 50). [Postage stamps]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/576rxwdcts-cor.
Chicago
“Postage Stamp (Photocopy).” Postage stamps. Civil War Collection, n.d. Box 4, Folder 50. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/576rxwdcts-cor.