MLA

Tinker, Chauncey Brewster, 1876-1963. "Affection and Love", pencil drawing. Box 4a, folder 127. n.d.. https://collections.library.yale.edu/catalog/10468082.

APA, 6th edition

Tinker, Chauncey Brewster, 1876-1963. (["Box 4a, folder 127"])(n.d.)["Affection and Love", pencil drawing]. https://collections.library.yale.edu/catalog/10468082.