MLA
A Man and Two Boys, One Who Is African American, and a Dog on a Boat. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 70. https://digital.library.emory.edu/purl/194hmgqnpr-cor.
APA, 6th edition
A man and two boys, one who is African American, and a dog on a boat (Box 70). [Postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/194hmgqnpr-cor.
Chicago
“A Man and Two Boys, One Who Is African American, and a Dog on a Boat.” 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/194hmgqnpr-cor.