MLA
Co., E. S. Our Gang Watermelon Party : Three Children Watching an African American Child Get a Watermelon. 1926. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 64. https://digital.library.emory.edu/purl/450gtht791-cor.
APA, 6th edition
Co., E. S. (1926). Our gang watermelon party : three children watching an African American child get a watermelon (Box 64) [Black-and-white photographs]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/450gtht791-cor.
Chicago
Co., E.S. “Our Gang Watermelon Party : Three Children Watching an African American Child Get a Watermelon.” Black-and-white photographs. Robert Langmuir African American Photograph Collection, 1926. Box 64. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/450gtht791-cor.