MLA

Kissinger, Henry, 1923-2023. Galley proofs. Box 270, folder 1. Circa 1965 February. https://collections.library.yale.edu/catalog/11786851.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 270, folder 1"])(Circa 1965 February)[Galley proofs]. https://collections.library.yale.edu/catalog/11786851.