MLA

Kissinger, Henry, 1923-2023. Hu. Box 26, folder 4. 2005. https://collections.library.yale.edu/catalog/12481357.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 26, folder 4"])(2005)[Hu]. https://collections.library.yale.edu/catalog/12481357.