MLA

Kissinger, Henry, 1923-2023. Rockefeller, Laurance. Box 51, folder 18. 1959-1968. https://collections.library.yale.edu/catalog/11783357.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 51, folder 18"])(1959-1968)[Rockefeller, Laurance]. https://collections.library.yale.edu/catalog/11783357.