MLA

Kissinger, Henry, 1923-2023. Br. Box 296, folder 3. 1968-1976. https://collections.library.yale.edu/catalog/11774419.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 296, folder 3"])(1968-1976)[Br]. https://collections.library.yale.edu/catalog/11774419.