MLA
Robert Henry with Samuel Alexander and Rub [Dog] Outside of House on Stairs in Lexington, Va., 1930. 1930. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 15. https://digital.library.emory.edu/purl/378tb2rbv2-cor.
APA, 6th edition
Robert Henry with Samuel Alexander and Rub [dog] outside of house on stairs in Lexington, Va., 1930 (Box 15). (1930). [Black-and-white photographs]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/378tb2rbv2-cor.
Chicago
“Robert Henry with Samuel Alexander and Rub [Dog] Outside of House on Stairs in Lexington, Va., 1930.” Black-and-white photographs. Robert Langmuir African American Photograph Collection, 1930. Box 15. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/378tb2rbv2-cor.