MLA

Kissinger, Henry, 1923-2023. Se. Box 336, folder 11. 1973-1976. https://collections.library.yale.edu/catalog/11775021.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 336, folder 11"])(1973-1976)[Se]. https://collections.library.yale.edu/catalog/11775021.