MLA

Kissinger, Henry, 1923-2023. Ca. Box 11, folder 9. 2003. https://collections.library.yale.edu/catalog/12479902.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 11, folder 9"])(2003)[Ca]. https://collections.library.yale.edu/catalog/12479902.