MLA

Hilles, Frederick W. (Frederick Whiley), 1900-1975. Aubrey, John. Box 1, folder 24. 1688 or 1689?. https://collections.library.yale.edu/catalog/9998670.

APA, 6th edition

Hilles, Frederick W. (Frederick Whiley), 1900-1975. (["Box 1, folder 24"])(1688 or 1689?)[Aubrey, John]. https://collections.library.yale.edu/catalog/9998670.