MLA

Kissinger, Henry, 1923-2023. Ca. Box 6, folder 10. 2002. https://collections.library.yale.edu/catalog/12479294.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 6, folder 10"])(2002)[Ca]. https://collections.library.yale.edu/catalog/12479294.