MLA

Kissinger, Henry, 1923-2023. Allon, Yigal. Box 2, folder 6. 1961-1965. https://collections.library.yale.edu/catalog/11782305.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 2, folder 6"])(1961-1965)[Allon, Yigal]. https://collections.library.yale.edu/catalog/11782305.