MLA

Kissinger, Henry, 1923-2023. Atlantic Colleges. Box 4, folder 4. 1964-1967. https://collections.library.yale.edu/catalog/11782338.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 4, folder 4"])(1964-1967)[Atlantic Colleges]. https://collections.library.yale.edu/catalog/11782338.