MLA

Kissinger, Henry, 1923-2023. Unidentified. Box 149, folder 5. 2007. https://collections.library.yale.edu/catalog/12479719.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 149, folder 5"])(2007)[Unidentified]. https://collections.library.yale.edu/catalog/12479719.