MLA
Major R.R. Wright Takes First Airplane Trip to Encourage Aviation and Commerce. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 72. https://digital.library.emory.edu/purl/470zpc868x-cor.
APA, 6th edition
Major R.R. Wright takes first airplane trip to encourage aviation and commerce (Box 72). [Postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/470zpc868x-cor.
Chicago
“Major R.R. Wright Takes First Airplane Trip to Encourage Aviation and Commerce.” Postcards. Robert Langmuir African American Photograph Collection, n.d. Box 72. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/470zpc868x-cor.