MLA
Shadle & Busser (Pa.). Harry C. William, in a suit coat and top hat, with a dog on the ground. unknown. Robert Langmuir African American Photograph Collection. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/887brv15ht-cor.
APA, 6th edition
Shadle & Busser (Pa.). (unknown)[Harry C. William, in a suit coat and top hat, with a dog on the ground]. Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/887brv15ht-cor.
Chicago
Shadle & Busser (Pa.), Harry C. William, in a suit coat and top hat, with a dog on the ground, unknown, Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/887brv15ht-cor.