MLA

Kissinger, Henry, 1923-2023. Mesthene, Emmanuel. Box 41, folder 21. 1965-1968. https://collections.library.yale.edu/catalog/11783143.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 41, folder 21"])(1965-1968)[Mesthene, Emmanuel]. https://collections.library.yale.edu/catalog/11783143.