MLA

Ford, Julia Ellsworth, 1859-1950. Byner, Witter. Box 1, folder 11. 1913-1919. https://collections.library.yale.edu/catalog/17167808.

APA, 6th edition

Ford, Julia Ellsworth, 1859-1950. (["Box 1, folder 11"])(1913-1919)[Byner, Witter]. https://collections.library.yale.edu/catalog/17167808.