MLA

Simpson, Randolph Linsly, 1927-1992. N.D. Morgan's, Norwich, CT Three quarter length portrait, lady seated with fancy ribbon collar. Tintype, paper face, sixth plate. Box 7, folder 114. circa 1870. https://collections.library.yale.edu/catalog/2002170.

APA, 6th edition

Simpson, Randolph Linsly, 1927-1992. (["Box 7, folder 114"])(circa 1870)[N.D. Morgan's, Norwich, CT Three quarter length portrait, lady seated with fancy ribbon collar. Tintype, paper face, sixth plate]. https://collections.library.yale.edu/catalog/2002170.