MLA

Kissinger, Henry, 1923-2023. Atlantic Council. Box 4, folder 9. 1967 December-1968 January. https://collections.library.yale.edu/catalog/11782343.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 4, folder 9"])(1967 December-1968 January)[Atlantic Council]. https://collections.library.yale.edu/catalog/11782343.