MLA
Hugh C. Leighton Co., Manufacturers (Portland, Me.). Washington's Old Headquarters, Richmond, Va. [hand colored]. November 17, 1906. Robert Langmuir African American Photograph Collection. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/631cjsxkvg-cor.
APA, 6th edition
Hugh C. Leighton Co., Manufacturers (Portland, Me.). (November 17, 1906)[Washington's Old Headquarters, Richmond, Va. [hand colored]]. Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/631cjsxkvg-cor.
Chicago
Hugh C. Leighton Co., Manufacturers (Portland, Me.), Washington's Old Headquarters, Richmond, Va. [hand colored], November 17, 1906, Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/631cjsxkvg-cor.