MLA

Kissinger, Henry, 1923-2023. Badeau, John. Box 160, folder 22. 1959 December-1960 June. https://collections.library.yale.edu/catalog/11785188.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 160, folder 22"])(1959 December-1960 June)[Badeau, John]. https://collections.library.yale.edu/catalog/11785188.