MLA
Squantum Joe : an African American Man Sittingon Steps Holding a Smoking Pipe. 1908. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 72. https://digital.library.emory.edu/purl/000000001k-cor.
APA, 6th edition
Squantum Joe : an African American man sittingon steps holding a smoking pipe (Box 72). (1908). [Photographic postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/000000001k-cor.
Chicago
“Squantum Joe : an African American Man Sittingon Steps Holding a Smoking Pipe.” Photographic postcards. Robert Langmuir African American Photograph Collection, 1908. Box 72. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/000000001k-cor.