MLA
W.J. Harris Co., Inc. (Saint Augustine, Fla.). Slave market and old cathedral, St. Augustine, Fla.. unknown. Robert Langmuir African American Photograph Collection. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/9117m0cg1t-cor.
APA, 6th edition
W.J. Harris Co., Inc. (Saint Augustine, Fla.). (unknown)[Slave market and old cathedral, St. Augustine, Fla.]. Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/9117m0cg1t-cor.
Chicago
W.J. Harris Co., Inc. (Saint Augustine, Fla.), Slave market and old cathedral, St. Augustine, Fla., unknown, Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/9117m0cg1t-cor.