MLA
Florida Pre Vues (New Port Richey, Fla.). A busy day in a cotton field down South : a group of African Americans picking cotton in a field with trees behind it. unknown. Robert Langmuir African American Photograph Collection. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/856n02v717-cor.
APA, 6th edition
Florida Pre Vues (New Port Richey, Fla.). (unknown)[A busy day in a cotton field down South : a group of African Americans picking cotton in a field with trees behind it]. Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/856n02v717-cor.
Chicago
Florida Pre Vues (New Port Richey, Fla.), A busy day in a cotton field down South : a group of African Americans picking cotton in a field with trees behind it, unknown, Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/856n02v717-cor.