MLA

Kissinger, Henry, 1923-2023. Me. Box 499, folder 9. 1987-1988. https://collections.library.yale.edu/catalog/11778597.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 499, folder 9"])(1987-1988)[Me]. https://collections.library.yale.edu/catalog/11778597.