MLA

Kissinger, Henry, 1923-2023. Hu. Box 441, folder 11. 1981. https://collections.library.yale.edu/catalog/11777866.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 441, folder 11"])(1981)[Hu]. https://collections.library.yale.edu/catalog/11777866.