MLA
Good Morning Boss : an African American Man with a Hat. 1906. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 72. https://digital.library.emory.edu/purl/962f7m0cjd-cor.
APA, 6th edition
Good morning boss : an African American man with a hat (Box 72). (1906). [Photographic postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/962f7m0cjd-cor.
Chicago
“Good Morning Boss : an African American Man with a Hat.” Photographic postcards. Robert Langmuir African American Photograph Collection, 1906. Box 72. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/962f7m0cjd-cor.