MLA
Slater's Interurban Post Card Studio (Toledo, Ohio). African American man sitting on a chair holding a cigar, while wearing a suit and hat. unknown. Robert Langmuir African American Photograph Collection. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/24298sf7nr-cor.
APA, 6th edition
Slater's Interurban Post Card Studio (Toledo, Ohio). (unknown)[African American man sitting on a chair holding a cigar, while wearing a suit and hat]. Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/24298sf7nr-cor.
Chicago
Slater's Interurban Post Card Studio (Toledo, Ohio), African American man sitting on a chair holding a cigar, while wearing a suit and hat, unknown, Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/24298sf7nr-cor.