MLA

Kissinger, Henry, 1923-2023. Fo. Box 31, folder 8. 2006. https://collections.library.yale.edu/catalog/12481403.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 31, folder 8"])(2006)[Fo]. https://collections.library.yale.edu/catalog/12481403.