MLA
An African American Man with a Guitar, an African Woman, an African American Boy, and a Dog. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 72. https://digital.library.emory.edu/purl/433dz08krk-cor.
APA, 6th edition
An African American man with a guitar, an African woman, an African American boy, and a dog (Box 72). [Photographic postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/433dz08krk-cor.
Chicago
“An African American Man with a Guitar, an African Woman, an African American Boy, and a Dog.” Photographic 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/433dz08krk-cor.