MLA
Sykes, P. C. Group of People Outside the Dental Office of C.R. Harrison in Philadelphia, Pa. 1907. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 15. https://digital.library.emory.edu/purl/4644qrfjds-cor.
APA, 6th edition
Sykes, P. C. (1907). Group of people outside the dental office of C.R. Harrison in Philadelphia, Pa. (Box 15) [Black-and-white photographs]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/4644qrfjds-cor.
Chicago
Sykes, P. C. “Group of People Outside the Dental Office of C.R. Harrison in Philadelphia, Pa.” Black-and-white photographs. Robert Langmuir African American Photograph Collection, 1907. Box 15. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/4644qrfjds-cor.