MLA

Kissinger, Henry, 1923-2023. Western Europe. Box 183, folder 6. 1962 February. https://collections.library.yale.edu/catalog/11785517.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 183, folder 6"])(1962 February)[Western Europe]. https://collections.library.yale.edu/catalog/11785517.