MLA

Kissinger, Henry, 1923-2023. Bo. Box 30, folder 5. 2006. https://collections.library.yale.edu/catalog/12481402.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 30, folder 5"])(2006)[Bo]. https://collections.library.yale.edu/catalog/12481402.