MLA

Kissinger, Henry, 1923-2023. Yu. Box 63, folder 1. 2002. https://collections.library.yale.edu/catalog/12481762.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 63, folder 1"])(2002)[Yu]. https://collections.library.yale.edu/catalog/12481762.