MLA
Gardner, J. If We Bust : Three African American Children Eating Watermelon. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 69. https://digital.library.emory.edu/purl/532d7wm3c6-cor.
APA, 6th edition
Gardner, J. If we bust : three African American children eating watermelon (Box 69) [Photographic postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/532d7wm3c6-cor.
Chicago
Gardner, J. “If We Bust : Three African American Children Eating Watermelon.” Photographic postcards. Robert Langmuir African American Photograph Collection, n.d. Box 69. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/532d7wm3c6-cor.