MLA

Clésinger-Sand, Solange, 1828-1899. Bennetot, ----. Box 1, folder 8. 1897-1898. https://collections.library.yale.edu/catalog/17444447.

APA, 6th edition

Clésinger-Sand, Solange, 1828-1899. (["Box 1, folder 8"])(1897-1898)[Bennetot, ----]. https://collections.library.yale.edu/catalog/17444447.