MLA

Clésinger-Sand, Solange, 1828-1899. Azmy, Nazli. Box 1, folder 4. 1894-1899, undated. https://collections.library.yale.edu/catalog/17444444.

APA, 6th edition

Clésinger-Sand, Solange, 1828-1899. (["Box 1, folder 4"])(1894-1899, undated)[Azmy, Nazli]. https://collections.library.yale.edu/catalog/17444444.