MLA
Huld, Franz. 1906 : Four African American Boys Eating Watermelon [Hand Colored]. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 69. https://digital.library.emory.edu/purl/986b2rbp38-cor.
APA, 6th edition
Huld, F. 1906 : four African American boys eating watermelon [hand colored] (Box 69) [Photographic postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/986b2rbp38-cor.
Chicago
Huld, Franz. “1906 : Four African American Boys Eating Watermelon [Hand Colored].” 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/986b2rbp38-cor.