MLA

Kissinger, Henry, 1923-2023. Bush, George. Box 567, folder 4. 1989. https://collections.library.yale.edu/catalog/11779652.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 567, folder 4"])(1989)[Bush, George]. https://collections.library.yale.edu/catalog/11779652.