MLA

Simpson, Randolph Linsly, 1927-1992. Studio unknown Bust portrait of man, wearing suit with stripped bow tie. Tintype in paper, ninth plate. Box 7, folder 124. circa 1870. https://collections.library.yale.edu/catalog/2002180.

APA, 6th edition

Simpson, Randolph Linsly, 1927-1992. (["Box 7, folder 124"])(circa 1870)[Studio unknown Bust portrait of man, wearing suit with stripped bow tie. Tintype in paper, ninth plate]. https://collections.library.yale.edu/catalog/2002180.