MLA

Kissinger, Henry, 1923-2023. Schedule. Box 365, folder 3. 1975 October. https://collections.library.yale.edu/catalog/11775455.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 365, folder 3"])(1975 October)[Schedule]. https://collections.library.yale.edu/catalog/11775455.