MLA
Chessler Co. (Baltimore, Md.). Two coons : an African American man holding a dead opposum on a stick. unknown. Robert Langmuir African American Photograph Collection. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/252j6q576j-cor.
APA, 6th edition
Chessler Co. (Baltimore, Md.). (unknown)[Two coons : an African American man holding a dead opposum on a stick]. Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/252j6q576j-cor.
Chicago
Chessler Co. (Baltimore, Md.), Two coons : an African American man holding a dead opposum on a stick, unknown, Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/252j6q576j-cor.