MLA
Perle's Studio (Saint Louis, Mo.). African American man sitting on a bench 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/419s1rn8rd-cor.
APA, 6th edition
Perle's Studio (Saint Louis, Mo.). (unknown)[African American man sitting on a bench 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/419s1rn8rd-cor.
Chicago
Perle's Studio (Saint Louis, Mo.), African American man sitting on a bench 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/419s1rn8rd-cor.