MLA

Eardley-Wilmot, John, 1750-1815. ALS (copy) to Benjamin West. Box 2, folder 57. 1809 Jun. https://collections.library.yale.edu/catalog/17365971.

APA, 6th edition

Eardley-Wilmot, John, 1750-1815. (["Box 2, folder 57"])(1809 Jun)[ALS (copy) to Benjamin West]. https://collections.library.yale.edu/catalog/17365971.