MLA

Kissinger, Henry, 1923-2023. Ad. Box 63, folder 8. 2003. https://collections.library.yale.edu/catalog/12481754.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 63, folder 8"])(2003)[Ad]. https://collections.library.yale.edu/catalog/12481754.