MLA
Grape Fruit : a Heavy Load, Florida : African American Boy with a Branch of Grapefruit on This Back [Hand Colored]. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 68. https://digital.library.emory.edu/purl/938jdfn32j-cor.
APA, 6th edition
Grape fruit : a heavy load, Florida : African American boy with a branch of grapefruit on this back [hand colored] (Box 68). [Postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/938jdfn32j-cor.
Chicago
“Grape Fruit : a Heavy Load, Florida : African American Boy with a Branch of Grapefruit on This Back [Hand Colored].” Postcards. Robert Langmuir African American Photograph Collection, n.d. Box 68. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/938jdfn32j-cor.