MLA

Kissinger, Henry, 1923-2023. Foreign Service Institute. Box 21, folder 15. 1964-1965. https://collections.library.yale.edu/catalog/11782700.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 21, folder 15"])(1964-1965)[Foreign Service Institute]. https://collections.library.yale.edu/catalog/11782700.