MLA
Canell Studio (New York, N.Y.). Portrait of Isabel Washington Powell. unknown. Robert Langmuir African American Photograph Collection. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/1676t1g1qd-cor.
APA, 6th edition
Canell Studio (New York, N.Y.). (unknown)[Portrait of Isabel Washington Powell]. Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/1676t1g1qd-cor.
Chicago
Canell Studio (New York, N.Y.), Portrait of Isabel Washington Powell, unknown, Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/1676t1g1qd-cor.