Autograph sheet
MLA
Champneys, Basil, 1842-1935. Autograph sheet. Box 1, folder 97. n.d.. https://collections.library.yale.edu/catalog/16495048.
APA, 6th edition
Champneys, Basil, 1842-1935. (["Box 1, folder 97"])(n.d.)[Autograph sheet]. https://collections.library.yale.edu/catalog/16495048.