MLA
A Little African American Girl on a Boat a the New York World's Fair in 1939. 1939. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 70. https://digital.library.emory.edu/purl/805fbg79hq-cor.
APA, 6th edition
A little African American girl on a boat a the New York World's Fair in 1939 (Box 70). (1939). [Photographic postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/805fbg79hq-cor.
Chicago
“A Little African American Girl on a Boat a the New York World's Fair in 1939.” Photographic postcards. Robert Langmuir African American Photograph Collection, 1939. Box 70. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/805fbg79hq-cor.