MLA

Simpson, Randolph Linsly, 1927-1992. Studio unknown Three quarter length portrait, young lady with hat seated by newel post. Tintype, sixth plate. Box 7, folder 88. circa 1870. https://collections.library.yale.edu/catalog/2002145.

APA, 6th edition

Simpson, Randolph Linsly, 1927-1992. (["Box 7, folder 88"])(circa 1870)[Studio unknown Three quarter length portrait, young lady with hat seated by newel post. Tintype, sixth plate]. https://collections.library.yale.edu/catalog/2002145.