MLA

Kissinger, Henry, 1923-2023. Correspondence, general. Box 128, folder 16. 1966-1967. https://collections.library.yale.edu/catalog/11784593.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 128, folder 16"])(1966-1967)[Correspondence, general]. https://collections.library.yale.edu/catalog/11784593.