MLA

Chopin, Henri, 1922-2008. Les milles pensées. Box 30. 1952-2007. https://collections.library.yale.edu/catalog/11194697.

APA, 6th edition

Chopin, Henri, 1922-2008. (["Box 30"])(1952-2007)[Les milles pensées]. https://collections.library.yale.edu/catalog/11194697.