MLA

Kissinger, Henry, 1923-2023. Pugwash Newsletter. Box 108, folder 4. 1963-1966. https://collections.library.yale.edu/catalog/11784239.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 108, folder 4"])(1963-1966)[Pugwash Newsletter]. https://collections.library.yale.edu/catalog/11784239.