MLA
C. E. Wheelock & Co. (Peoria, Ill.). Picking cotton, Memphis, Tenn. [hand colored]. unknown. Robert Langmuir African American Photograph Collection. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/525k98sfbg-cor.
APA, 6th edition
C. E. Wheelock & Co. (Peoria, Ill.). (unknown)[Picking cotton, Memphis, Tenn. [hand colored]]. Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/525k98sfbg-cor.
Chicago
C. E. Wheelock & Co. (Peoria, Ill.), Picking cotton, Memphis, Tenn. [hand colored], unknown, Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/525k98sfbg-cor.