MLA
Agency., Joseph B. Carper Adv. Holiday Inn of Washington, D.C. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 71. https://digital.library.emory.edu/purl/39995x69r4-cor.
APA, 6th edition
Agency., J. B. C. A. Holiday Inn of Washington, D.C. (Box 71) [Photographic postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/39995x69r4-cor.
Chicago
Agency., Joseph B. Carper Adv. “Holiday Inn of Washington, D.C.” Photographic 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/39995x69r4-cor.