MLA

Kissinger, Henry, 1923-2023. Di. Box 31, folder 2. 2006. https://collections.library.yale.edu/catalog/12481611.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 31, folder 2"])(2006)[Di]. https://collections.library.yale.edu/catalog/12481611.