MLA

Luhan, Mabel Dodge, 1879-1962. MacMillan, Mary [Louise?]. Box 25, folder 686. 1932 Apr 8. https://collections.library.yale.edu/catalog/17085358.

APA, 6th edition

Luhan, Mabel Dodge, 1879-1962. (["Box 25, folder 686"])(1932 Apr 8)[MacMillan, Mary [Louise?]]. https://collections.library.yale.edu/catalog/17085358.