MLA

Clésinger-Sand, Solange, 1828-1899. Delagrave, Charles. Box 1, folder 25. 1894. https://collections.library.yale.edu/catalog/17444460.

APA, 6th edition

Clésinger-Sand, Solange, 1828-1899. (["Box 1, folder 25"])(1894)[Delagrave, Charles]. https://collections.library.yale.edu/catalog/17444460.