MLA
Co., Albertype. Greetings from Galveston : Four African American Boys Sitting. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 72. https://digital.library.emory.edu/purl/757np5hqdv-cor.
APA, 6th edition
Co., A. Greetings from Galveston : four African American boys sitting (Box 72) [Postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/757np5hqdv-cor.
Chicago
Co., Albertype. “Greetings from Galveston : Four African American Boys Sitting.” 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/757np5hqdv-cor.