MLA

Ford, Julia Ellsworth, 1859-1950. Graham, Stephen. Box 1, folder 30. 1920. https://collections.library.yale.edu/catalog/17167827.

APA, 6th edition

Ford, Julia Ellsworth, 1859-1950. (["Box 1, folder 30"])(1920)[Graham, Stephen]. https://collections.library.yale.edu/catalog/17167827.