MLA

Kissinger, Henry, 1923-2023. "Role of War in International Conflict," National War College, Aug 31, 1956. Box 241, folder 5. Circa 1956 August. https://collections.library.yale.edu/catalog/11786352.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 241, folder 5"])(Circa 1956 August)["Role of War in International Conflict," National War College, Aug 31, 1956]. https://collections.library.yale.edu/catalog/11786352.