MLA
Chickering, Elmer. A Portrait of Booker T. Washington. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 61. https://digital.library.emory.edu/purl/651vdncjws-cor.
APA, 6th edition
Chickering, E. A portrait of Booker T. Washington (Box 61) [Card photographs (photographs)]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/651vdncjws-cor.
Chicago
Chickering, Elmer. “A Portrait of Booker T. Washington.” Card photographs (photographs). Robert Langmuir African American Photograph Collection, n.d. Box 61. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/651vdncjws-cor.