MLA
Rotograph Co. (New York, N.Y.). A Florida pickaninny : an African American baby sitting up. unknown. Robert Langmuir African American Photograph Collection. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/607gqnk9c9-cor.
APA, 6th edition
Rotograph Co. (New York, N.Y.). (unknown)[A Florida pickaninny : an African American baby sitting up]. Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/607gqnk9c9-cor.
Chicago
Rotograph Co. (New York, N.Y.), A Florida pickaninny : an African American baby sitting up, unknown, Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/607gqnk9c9-cor.