MLA
Underwood, and Underwood. Palms of Cuba the Pearl of the Antilles Botanical Gardens, Havana, Cuba. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 76. https://digital.library.emory.edu/purl/39995x69pp-cor.
APA, 6th edition
U., & U. Palms of Cuba the Pearl of the Antilles Botanical Gardens, Havana, Cuba (Box 76) [Photographic postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/39995x69pp-cor.
Chicago
Underwood, and Underwood. “Palms of Cuba the Pearl of the Antilles Botanical Gardens, Havana, Cuba.” Photographic postcards. Robert Langmuir African American Photograph Collection, n.d. Box 76. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/39995x69pp-cor.