MLA

Kissinger, Henry, 1923-2023. Kintner, William. Box 301, folder 5. 1968-1969. https://collections.library.yale.edu/catalog/11774511.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 301, folder 5"])(1968-1969)[Kintner, William]. https://collections.library.yale.edu/catalog/11774511.