MLA
Studio., Marshall's. Portrait of Mary L. Harrod in a Long Sleeved Floor Length Dress and a Long Necklace. 1904. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 42. https://digital.library.emory.edu/purl/4816m905w0-cor.
APA, 6th edition
Studio., M. (1904). Portrait of Mary L. Harrod in a long sleeved floor length dress and a long necklace (Box 42) [Card photographs (photographs)]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/4816m905w0-cor.
Chicago
Studio., Marshall's. “Portrait of Mary L. Harrod in a Long Sleeved Floor Length Dress and a Long Necklace.” Card photographs (photographs). Robert Langmuir African American Photograph Collection, 1904. Box 42. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/4816m905w0-cor.