MLA

Kissinger, Henry, 1923-2023. Paris. Box 766, folder 30. 1970 September. https://collections.library.yale.edu/catalog/11776480.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 766, folder 30"])(1970 September)[Paris]. https://collections.library.yale.edu/catalog/11776480.