MLA
Marschall, M. Grapefruit Tree in Florida : African American Man near Grapefruit Trees Holding Two [Hand Colored]. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 68. https://digital.library.emory.edu/purl/153jwstqnb-cor.
APA, 6th edition
Marschall, M. Grapefruit tree in Florida : African American man near grapefruit trees holding two [hand colored] (Box 68) [Postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/153jwstqnb-cor.
Chicago
Marschall, M. “Grapefruit Tree in Florida : African American Man near Grapefruit Trees Holding Two [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/153jwstqnb-cor.