MLA

Kissinger, Henry, 1923-2023. Atlantic Institute. Box 5, folder 5. 1968. https://collections.library.yale.edu/catalog/11782352.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 5, folder 5"])(1968)[Atlantic Institute]. https://collections.library.yale.edu/catalog/11782352.