MLA
Withers, William C. Portrait of African American Nurse. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 15. https://digital.library.emory.edu/purl/4407wm37w9-cor.
APA, 6th edition
Withers, W. C. Portrait of African American nurse (Box 15) [Card photographs (photographs)]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/4407wm37w9-cor.
Chicago
Withers, William C. “Portrait of African American Nurse.” Card photographs (photographs). Robert Langmuir African American Photograph Collection, n.d. Box 15. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/4407wm37w9-cor.