MLA
Simpson, R. E. Have an Orange in Sunny Florida : [African American Children Posing with Oranges in Their Hands] [Hand Colored]. 1943. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 68. https://digital.library.emory.edu/purl/774qjq2c0b-cor.
APA, 6th edition
Simpson, R. E. (1943). Have an orange in sunny Florida : [African American children posing with oranges in their hands] [hand colored] (Box 68) [Postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/774qjq2c0b-cor.
Chicago
Simpson, R. E. “Have an Orange in Sunny Florida : [African American Children Posing with Oranges in Their Hands] [Hand Colored].” Postcards. Robert Langmuir African American Photograph Collection, 1943. Box 68. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/774qjq2c0b-cor.