MLA

Loy, Mina (1882-1966). Illustrations. Box 1, folder 26. n.d.. https://collections.library.yale.edu/catalog/11176126.

APA, 6th edition

Loy, Mina (1882-1966). (["Box 1, folder 26"])(n.d.)[Illustrations]. https://collections.library.yale.edu/catalog/11176126.