MLA

Kissinger, Henry, 1923-2023. Buckley, William F., Jr.. Box 326, folder 13. 1968-1976. https://collections.library.yale.edu/catalog/11774886.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 326, folder 13"])(1968-1976)[Buckley, William F., Jr.]. https://collections.library.yale.edu/catalog/11774886.