MLA

House, Edward Mandell, 1858-1938. Final version. Box 298, folder 3. 1916 July. https://collections.library.yale.edu/catalog/33433820.

APA, 6th edition

House, Edward Mandell, 1858-1938. (["Box 298, folder 3"])(1916 July)[Final version]. https://collections.library.yale.edu/catalog/33433820.