MLA
A. C. Bosselman & Co. (N.Y.). Picking pines in Florida : African Americans working in a field of pineapples. unknown. Robert Langmuir African American Photograph Collection. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/846d2547hz-cor.
APA, 6th edition
A. C. Bosselman & Co. (N.Y.). (unknown)[Picking pines in Florida : African Americans working in a field of pineapples]. Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/846d2547hz-cor.
Chicago
A. C. Bosselman & Co. (N.Y.), Picking pines in Florida : African Americans working in a field of pineapples, unknown, Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/846d2547hz-cor.