MLA

Simpson, Randolph Linsly, 1927-1992. Unknown photographer Public Square St. Augustine, FL with view of Old Slave Market and Confederate Market, foreground; St Augustine Hotel and Spanish Cathedral, background. Later 19th century photograph, mounted, 6-1/2 x 9-1/2. Box 17, folder 798. circa 1895. https://collections.library.yale.edu/catalog/9999040.

APA, 6th edition

Simpson, Randolph Linsly, 1927-1992. (["Box 17, folder 798"])(circa 1895)[Unknown photographer Public Square St. Augustine, FL with view of Old Slave Market and Confederate Market, foreground; St Augustine Hotel and Spanish Cathedral, background. Later 19th century photograph, mounted, 6-1/2 x 9-1/2]. https://collections.library.yale.edu/catalog/9999040.