MLA

Darling, Lois, and Louis Darling. [Mirror Image of Many Different Animals]. 0AD. https://collections.library.yale.edu/catalog/2038034.

APA, 6th edition

Darling, L., & Darling, L. (0 C.E.). [Mirror image of many different animals] [Drawings, Illustrations, Prints (Visual works)]. https://collections.library.yale.edu/catalog/2038034.