MLA

Kissinger, Henry, 1923-2023. Pont-Royal Hotel. Box 48, folder 9. 1967. https://collections.library.yale.edu/catalog/11783282.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 48, folder 9"])(1967)[Pont-Royal Hotel]. https://collections.library.yale.edu/catalog/11783282.