MLA

Kissinger, Henry, 1923-2023. Buzzard, Anthony. Box 11, folder 6. 1958-1968. https://collections.library.yale.edu/catalog/11782472.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 11, folder 6"])(1958-1968)[Buzzard, Anthony]. https://collections.library.yale.edu/catalog/11782472.