MLA
Broadbent, and Phillips. Portrait of Joseph Roberts Wearing a Suit and Bow Tie. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 63. https://digital.library.emory.edu/purl/0171vhhmkc-cor.
APA, 6th edition
B., & P. Portrait of Joseph Roberts wearing a suit and bow tie (Box 63) [Card photographs (photographs)]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/0171vhhmkc-cor.
Chicago
Broadbent, and Phillips. “Portrait of Joseph Roberts Wearing a Suit and Bow Tie.” Card photographs (photographs). Robert Langmuir African American Photograph Collection, n.d. Box 63. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/0171vhhmkc-cor.