MLA
Rochester Photo Press (N.Y.). Regards to you : an African American baby in a diaper drinking out of a goblet. unknown. Robert Langmuir African American Photograph Collection. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/552w3r22bp-cor.
APA, 6th edition
Rochester Photo Press (N.Y.). (unknown)[Regards to you : an African American baby in a diaper drinking out of a goblet]. Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/552w3r22bp-cor.
Chicago
Rochester Photo Press (N.Y.), Regards to you : an African American baby in a diaper drinking out of a goblet, unknown, Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/552w3r22bp-cor.