MLA

Kissinger, Henry, 1923-2023. Rumsfeld, Donald. Box 629, folder 15. 2001. https://collections.library.yale.edu/catalog/11780449.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 629, folder 15"])(2001)[Rumsfeld, Donald]. https://collections.library.yale.edu/catalog/11780449.