MLA

Kissinger, Henry, 1923-2023. vanden Heuval, William. Box 60, folder 16. 1967. https://collections.library.yale.edu/catalog/11783553.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 60, folder 16"])(1967)[vanden Heuval, William]. https://collections.library.yale.edu/catalog/11783553.