MLA

Kissinger, Henry, 1923-2023. Articles. Box 304, folder 9. 1969 February-April. https://collections.library.yale.edu/catalog/11774560.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 304, folder 9"])(1969 February-April)[Articles]. https://collections.library.yale.edu/catalog/11774560.