MLA

Tinker, Chauncey Brewster, 1876-1963. "Nor fox, nor wolf, nor rot among our sheep", pencil and pen-and-ink drawing. Box 4a, folder 128. n.d.. https://collections.library.yale.edu/catalog/10468083.

APA, 6th edition

Tinker, Chauncey Brewster, 1876-1963. (["Box 4a, folder 128"])(n.d.)["Nor fox, nor wolf, nor rot among our sheep", pencil and pen-and-ink drawing]. https://collections.library.yale.edu/catalog/10468083.