MLA

Kissinger, Henry, 1923-2023. "Net Evaluation of the Conflict," National Strategy Seminar, National War College, Jul 13, 1959. Box 245, folder 8. Circa 1959 July. https://collections.library.yale.edu/catalog/11786423.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 245, folder 8"])(Circa 1959 July)["Net Evaluation of the Conflict," National Strategy Seminar, National War College, Jul 13, 1959]. https://collections.library.yale.edu/catalog/11786423.