MLA

Kissinger, Henry, 1923-2023. Hu. Box 535, folder 2. 1997. https://collections.library.yale.edu/catalog/11779166.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 535, folder 2"])(1997)[Hu]. https://collections.library.yale.edu/catalog/11779166.