MLA

Kissinger, Henry, 1923-2023. NATO Defense College. Box 44, folder 9. 1959-1966. https://collections.library.yale.edu/catalog/11783203.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 44, folder 9"])(1959-1966)[NATO Defense College]. https://collections.library.yale.edu/catalog/11783203.