MLA

Archiquette, John, 1847-1923. United States Treasury Department, Liberty Loan Organization to Archiquette, John. Box 2, folder 39. 1918 September 26. https://collections.library.yale.edu/catalog/16715395.

APA, 6th edition

Archiquette, John, 1847-1923. (["Box 2, folder 39"])(1918 September 26)[United States Treasury Department, Liberty Loan Organization to Archiquette, John]. https://collections.library.yale.edu/catalog/16715395.