MLA

Ford, Julia Ellsworth, 1859-1950. Plays, typescript. Box 4, folder 101. undated. https://collections.library.yale.edu/catalog/17167850.

APA, 6th edition

Ford, Julia Ellsworth, 1859-1950. (["Box 4, folder 101"])(undated)[Plays, typescript]. https://collections.library.yale.edu/catalog/17167850.