MLA

Ford, Julia Ellsworth, 1859-1950. Unpublished writings, typescript. Box 5, folder 106-107. undated. https://collections.library.yale.edu/catalog/17167855.

APA, 6th edition

Ford, Julia Ellsworth, 1859-1950. (["Box 5, folder 106-107"])(undated)[Unpublished writings, typescript]. https://collections.library.yale.edu/catalog/17167855.