MLA

Kissinger, Henry, 1923-2023. Goldthwait, June. Box 150, folder 6. 1962 June-1963 May. https://collections.library.yale.edu/catalog/11784988.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 150, folder 6"])(1962 June-1963 May)[Goldthwait, June]. https://collections.library.yale.edu/catalog/11784988.