MLA
Rosin, and Co. A Florida Racer : Two African American Men and an Ostrich-Drawn Cart [Hand Colored]. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 73. https://digital.library.emory.edu/purl/259c59zw5t-cor.
APA, 6th edition
R., & C. A Florida racer : Two African American men and an ostrich-drawn cart [hand colored] (Box 73) [Photographic postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/259c59zw5t-cor.
Chicago
Rosin, and Co. “A Florida Racer : Two African American Men and an Ostrich-Drawn Cart [Hand Colored].” Photographic postcards. Robert Langmuir African American Photograph Collection, n.d. Box 73. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/259c59zw5t-cor.