MLA
Gilbert & Bacon (Philadelphia, Pa.). African American runner. unknown. Robert Langmuir African American Photograph Collection. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/320sqv9s7j-cor.
APA, 6th edition
Gilbert & Bacon (Philadelphia, Pa.). (unknown)[African American runner]. Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/320sqv9s7j-cor.
Chicago
Gilbert & Bacon (Philadelphia, Pa.), African American runner, unknown, Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/320sqv9s7j-cor.