MLA
Conn, and Thomas. Real Estate Map of Fourty-Five Lots for Sale, Stone Mountain, DeKalb County, Georgia. 1908. Stuart A. Rose Manuscript, Archives, and Rare Book Library, OP2, Folder 5. https://digital.library.emory.edu/purl/839k3j9kt8-cor.
APA, 6th edition
C., & T. (1908). Real estate map of fourty-five lots for sale, Stone Mountain, DeKalb County, Georgia (OP2, Folder 5) [Cadastral maps]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/839k3j9kt8-cor.
Chicago
Conn, and Thomas. “Real Estate Map of Fourty-Five Lots for Sale, Stone Mountain, DeKalb County, Georgia.” Cadastral maps. Atlanta Miscellany Collection, 1908. OP2, Folder 5. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/839k3j9kt8-cor.