MLA

Whitney, Eli, 1765-1825. 1807. Box 2, folder 29, reel 2 | reel 2U. 1807. https://collections.library.yale.edu/catalog/32521299.

APA, 6th edition

Whitney, Eli, 1765-1825. (["Box 2, folder 29, reel 2 | reel 2U"])(1807)[1807]. https://collections.library.yale.edu/catalog/32521299.