MLA
Richter & Co. Art Studio (Philadelphia, Pa.). The great grand child of Thompson, wearing a dress standing outside.. unknown. Robert Langmuir African American Photograph Collection. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/0106wwpzjz-cor.
APA, 6th edition
Richter & Co. Art Studio (Philadelphia, Pa.). (unknown)[The great grand child of Thompson, wearing a dress standing outside.]. Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/0106wwpzjz-cor.
Chicago
Richter & Co. Art Studio (Philadelphia, Pa.), The great grand child of Thompson, wearing a dress standing outside., unknown, Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/0106wwpzjz-cor.