MLA

Kissinger, Henry, 1923-2023. Pentagon. Box 15, folder 7. 2003. https://collections.library.yale.edu/catalog/12480388.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 15, folder 7"])(2003)[Pentagon]. https://collections.library.yale.edu/catalog/12480388.