MLA

Luhan, Mabel Dodge, 1879-1962. Hall, ----. Box 66, folder 1795. [1890s]. https://collections.library.yale.edu/catalog/10268291.

APA, 6th edition

Luhan, Mabel Dodge, 1879-1962. (["Box 66, folder 1795"])([1890s])[Hall, ----]. https://collections.library.yale.edu/catalog/10268291.