MLA

Kissinger, Henry, 1923-2023. Franck, Thomas. Box 199, folder 12. 1968 March-November. https://collections.library.yale.edu/catalog/11785831.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 199, folder 12"])(1968 March-November)[Franck, Thomas]. https://collections.library.yale.edu/catalog/11785831.