MLA
Bell Studio (N.Y.). Posed portrait of 4 entertainers, three men in suits and hats, one of which is in blackface, and a woman in a dress. unknown. Langmuir Deposit - Sept 2020. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/327mpg4fgw-cor.
APA, 6th edition
Bell Studio (N.Y.). (unknown)[Posed portrait of 4 entertainers, three men in suits and hats, one of which is in blackface, and a woman in a dress]. Langmuir Deposit - Sept 2020, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/327mpg4fgw-cor.
Chicago
Bell Studio (N.Y.), Posed portrait of 4 entertainers, three men in suits and hats, one of which is in blackface, and a woman in a dress, unknown, Langmuir Deposit - Sept 2020, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/327mpg4fgw-cor.