MLA
Plantation Singers : Two African American Men Sitting by a Tree Playing Guitar, with Two Other Men, and Three Women Singing in Front of Them, Outside of Stratford Hall. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 70. https://digital.library.emory.edu/purl/245q83bk6z-cor.
APA, 6th edition
Plantation singers : two African American men sitting by a tree playing guitar, with two other men, and three women singing in front of them, outside of Stratford Hall (Box 70). [Photographic postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/245q83bk6z-cor.
Chicago
“Plantation Singers : Two African American Men Sitting by a Tree Playing Guitar, with Two Other Men, and Three Women Singing in Front of Them, Outside of Stratford Hall.” Photographic postcards. Robert Langmuir African American Photograph Collection, n.d. Box 70. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/245q83bk6z-cor.