MLA
Service., Benjamin's Photo Art. Bicycle Chairs at the Grand Hotel : Mackinac Island, Michigan. 1961. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 71. https://digital.library.emory.edu/purl/38279cnp70-cor.
APA, 6th edition
Service., B. P. A. (1961). Bicycle chairs at the Grand Hotel : Mackinac Island, Michigan (Box 71) [Photographic postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/38279cnp70-cor.
Chicago
Service., Benjamin's Photo Art. “Bicycle Chairs at the Grand Hotel : Mackinac Island, Michigan.” Photographic postcards. Robert Langmuir African American Photograph Collection, 1961. Box 71. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/38279cnp70-cor.