MLA

Simpson, Randolph Linsly, 1927-1992. Unknown photographer Three quarter length portrait, seated elderly lady with fancy dress and white bonnet, holding handkerchief and glasses. Ambrotype, sixth plate. Box 3, folder 32. circa 1858. https://collections.library.yale.edu/catalog/2002052.

APA, 6th edition

Simpson, Randolph Linsly, 1927-1992. (["Box 3, folder 32"])(circa 1858)[Unknown photographer Three quarter length portrait, seated elderly lady with fancy dress and white bonnet, holding handkerchief and glasses. Ambrotype, sixth plate]. https://collections.library.yale.edu/catalog/2002052.