MLA
Wright, Ham. Roast Pig Fiesta, Puerto Rico. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 70. https://digital.library.emory.edu/purl/907tmpg4js-cor.
APA, 6th edition
Wright, H. Roast pig fiesta, Puerto Rico (Box 70) [Postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/907tmpg4js-cor.
Chicago
Wright, Ham. “Roast Pig Fiesta, Puerto Rico.” Postcards. Robert Langmuir African American Photograph Collection, n.d. Box 70. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/907tmpg4js-cor.