MLA
Paxson, Chas. (Charles), -1880. Learning is wealth : Wilson, Charley, Rebecca & Rosa, slaves from New Orleans : an African American man seated in a chair with a book in his hand with two girls and a boy seated around him also holding books. 1864. Robert Langmuir African American Photograph Collection. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/2257d7wm64-cor.
APA, 6th edition
Paxson, Chas. (Charles), -1880. (1864)[Learning is wealth : Wilson, Charley, Rebecca & Rosa, slaves from New Orleans : an African American man seated in a chair with a book in his hand with two girls and a boy seated around him also holding books]. Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/2257d7wm64-cor.
Chicago
Paxson, Chas. (Charles), -1880, Learning is wealth : Wilson, Charley, Rebecca & Rosa, slaves from New Orleans : an African American man seated in a chair with a book in his hand with two girls and a boy seated around him also holding books, 1864, Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/2257d7wm64-cor.