MLA
Advertisement for Mr. Dion Boucicault's Play, The Octoroon, or, Life in Louisiana. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 74. https://digital.library.emory.edu/purl/491fj6q59h-cor.
APA, 6th edition
Advertisement for Mr. Dion Boucicault's play, The Octoroon, or, Life in Louisiana (Box 74). [Photographic postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/491fj6q59h-cor.
Chicago
“Advertisement for Mr. Dion Boucicault's Play, The Octoroon, or, Life in Louisiana.” Photographic postcards. Robert Langmuir African American Photograph Collection, n.d. Box 74. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/491fj6q59h-cor.