MLA

Kissinger, Henry, 1923-2023. Speakers-Enthoven, Alain. Box 130, folder 16. 1968 October 21. https://collections.library.yale.edu/catalog/11784627.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 130, folder 16"])(1968 October 21)[Speakers-Enthoven, Alain]. https://collections.library.yale.edu/catalog/11784627.