MLA

Kissinger, Henry, 1923-2023. Atlantic Council. Box 4, folder 10. 1968 February-May. https://collections.library.yale.edu/catalog/11782344.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 4, folder 10"])(1968 February-May)[Atlantic Council]. https://collections.library.yale.edu/catalog/11782344.