MLA

Mickle, William Julius, 1735-1788. Mickle, Thomas. Box 2, folder 108-109. 1776-1789. https://collections.library.yale.edu/catalog/16684789.

APA, 6th edition

Mickle, William Julius, 1735-1788. (["Box 2, folder 108-109"])(1776-1789)[Mickle, Thomas]. https://collections.library.yale.edu/catalog/16684789.