MLA
Bruen, John, Sr. Four African American Boys in Baseball Uniforms. 1958. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 37. https://digital.library.emory.edu/purl/4816m905wb-cor.
APA, 6th edition
Bruen, J., Sr. (1958). Four African American boys in baseball uniforms. (Box 37) [Card photographs (photographs)]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/4816m905wb-cor.
Chicago
Bruen, John, Sr. “Four African American Boys in Baseball Uniforms.” Card photographs (photographs). Robert Langmuir African American Photograph Collection, 1958. Box 37. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/4816m905wb-cor.