MLA

Kissinger, Henry, 1923-2023. Cherne, Leo. Box 450, folder 5. 1982. https://collections.library.yale.edu/catalog/11777963.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 450, folder 5"])(1982)[Cherne, Leo]. https://collections.library.yale.edu/catalog/11777963.