MLA
Wrenn & King (Lexington, Ky.). Stripping blue grass in Kentucky : African American men on a donkey cart in a field [hand colored]. unknown. Robert Langmuir African American Photograph Collection. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/97634tmpkk-cor.
APA, 6th edition
Wrenn & King (Lexington, Ky.). (unknown)[Stripping blue grass in Kentucky : African American men on a donkey cart in a field [hand colored]]. Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/97634tmpkk-cor.
Chicago
Wrenn & King (Lexington, Ky.), Stripping blue grass in Kentucky : African American men on a donkey cart in a field [hand colored], unknown, Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/97634tmpkk-cor.