MLA
Two Women and a Man Sitting next to Sign That Reads Off To California. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 11. https://digital.library.emory.edu/purl/624jm63xzs-cor.
APA, 6th edition
Two women and a man sitting next to sign that reads Off To California (Box 11). [Photographic postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/624jm63xzs-cor.
Chicago
“Two Women and a Man Sitting next to Sign That Reads Off To California.” Photographic postcards. Robert Langmuir African American Photograph Collection, n.d. Box 11. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/624jm63xzs-cor.