MLA
Advertising : The 4 Ink Spots, an African American Musical Group, with a Record, and Advertisement for Their Concert. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 70. https://digital.library.emory.edu/purl/590dv41nwk-cor.
APA, 6th edition
Advertising : The 4 Ink Spots, an African American musical group, with a record, and advertisement for their concert (Box 70). [Photographic postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/590dv41nwk-cor.
Chicago
“Advertising : The 4 Ink Spots, an African American Musical Group, with a Record, and Advertisement for Their Concert.” Photographic postcards. Robert Langmuir African American Photograph Collection, n.d. Box 70. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/590dv41nwk-cor.