MLA
Rosin, and Co. Charlotte St., St. Augustine, Fla. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 71. https://digital.library.emory.edu/purl/228ncjsxqn-cor.
APA, 6th edition
R., & C. Charlotte St., St. Augustine, Fla. (Box 71) [Postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/228ncjsxqn-cor.
Chicago
Rosin, and Co. “Charlotte St., St. Augustine, Fla.” Postcards. Robert Langmuir African American Photograph Collection, n.d. Box 71. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/228ncjsxqn-cor.