MLA

Simpson, Randolph Linsly, 1927-1992. Studio unknown Bust portrait of John Redman, in suit with hanging watch chain. Tintype, paper case, sixth plate. Box 7, folder 127. circa 1868. https://collections.library.yale.edu/catalog/2002183.

APA, 6th edition

Simpson, Randolph Linsly, 1927-1992. (["Box 7, folder 127"])(circa 1868)[Studio unknown Bust portrait of John Redman, in suit with hanging watch chain. Tintype, paper case, sixth plate]. https://collections.library.yale.edu/catalog/2002183.