MLA

Kissinger, Henry, 1923-2023. American P-Americas. Box 87, folder 6. 2004. https://collections.library.yale.edu/catalog/12479230.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 87, folder 6"])(2004)[American P-Americas]. https://collections.library.yale.edu/catalog/12479230.