MLA

Herbert, William, 1778-1847. Butterflies drawn by W. Herbert Dean of Manchester. Box 2 | HERBERT, Henry William: Objects, photographs, drawings, etc.. Undated. https://collections.library.yale.edu/catalog/9998512.

APA, 6th edition

Herbert, William, 1778-1847. (["Box 2 | HERBERT, Henry William: Objects, photographs, drawings, etc."])(Undated)[Butterflies drawn by W. Herbert Dean of Manchester]. https://collections.library.yale.edu/catalog/9998512.