MLA

Kissinger, Henry, 1923-2023. Kintner, William. Box 35, folder 7. 1956-1958. https://collections.library.yale.edu/catalog/11782994.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 35, folder 7"])(1956-1958)[Kintner, William]. https://collections.library.yale.edu/catalog/11782994.