MLA
An African American Man Looking at an Opossum in a Tree, with a Dog on the Ground. 1910. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 69. https://digital.library.emory.edu/purl/296wwpzgqv-cor.
APA, 6th edition
An African American man looking at an opossum in a tree, with a dog on the ground (Box 69). (1910). [Postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/296wwpzgqv-cor.
Chicago
“An African American Man Looking at an Opossum in a Tree, with a Dog on the Ground.” Postcards. Robert Langmuir African American Photograph Collection, 1910. Box 69. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/296wwpzgqv-cor.