MLA

Simpson, Randolph Linsly, 1927-1992. Studio unknown Full length portrait; young lady standing by chair, white neck piece. Tintype, sixth plate. Box 7, folder 87. circa 1890. https://collections.library.yale.edu/catalog/2002144.

APA, 6th edition

Simpson, Randolph Linsly, 1927-1992. (["Box 7, folder 87"])(circa 1890)[Studio unknown Full length portrait; young lady standing by chair, white neck piece. Tintype, sixth plate]. https://collections.library.yale.edu/catalog/2002144.