MLA

Simpson, Randolph Linsly, 1927-1992. Unknown photographer Three quarter length portrait, young solder seated, kepi and cigar. Cased tintype, sixth plate. Box 5, folder 68. circa 1865. https://collections.library.yale.edu/catalog/2002125.

APA, 6th edition

Simpson, Randolph Linsly, 1927-1992. (["Box 5, folder 68"])(circa 1865)[Unknown photographer Three quarter length portrait, young solder seated, kepi and cigar. Cased tintype, sixth plate]. https://collections.library.yale.edu/catalog/2002125.