MLA

Kissinger, Henry, 1923-2023. Weidenfeld, George. Box 63, folder 2. 1965. https://collections.library.yale.edu/catalog/11783607.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 63, folder 2"])(1965)[Weidenfeld, George]. https://collections.library.yale.edu/catalog/11783607.