MLA
Biles Studio (West Chester, Pa.). African American cooks sitting on the steps to a building. unknown. Robert Langmuir African American Photograph Collection. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/825x69p8js-cor.
APA, 6th edition
Biles Studio (West Chester, Pa.). (unknown)[African American cooks sitting on the steps to a building]. Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/825x69p8js-cor.
Chicago
Biles Studio (West Chester, Pa.), African American cooks sitting on the steps to a building, unknown, Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/825x69p8js-cor.