MLA
Souvenir Post Card Co. (N.Y.). Shrimp vender : an African American man holding a container of shrimp. unknown. Robert Langmuir African American Photograph Collection. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/68605qftwx-cor.
APA, 6th edition
Souvenir Post Card Co. (N.Y.). (unknown)[Shrimp vender : an African American man holding a container of shrimp]. Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/68605qftwx-cor.
Chicago
Souvenir Post Card Co. (N.Y.), Shrimp vender : an African American man holding a container of shrimp, unknown, Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/68605qftwx-cor.