MLA

Kissinger, Henry, 1923-2023. Schedule. Box 363, folder 8. 1973 September 22-October. https://collections.library.yale.edu/catalog/11775444.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 363, folder 8"])(1973 September 22-October)[Schedule]. https://collections.library.yale.edu/catalog/11775444.