Cite

Manuscript notes, chiefly contemporary reports, used in writing the book

MLA

Percival, James Gates, 1795-1856. Manuscript notes, chiefly contemporary reports, used in writing the book. Box 18, folder 436. circa 1865. https://collections.library.yale.edu/catalog/17067797.

APA, 6th edition

Percival, James Gates, 1795-1856. (["Box 18, folder 436"])(circa 1865)[Manuscript notes, chiefly contemporary reports, used in writing the book]. https://collections.library.yale.edu/catalog/17067797.