MLA

Kissinger, Henry, 1923-2023. Oettinger, Anthony. Box 302, folder 8. Circa 1968-circa 1971. https://collections.library.yale.edu/catalog/11774529.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 302, folder 8"])(Circa 1968-circa 1971)[Oettinger, Anthony]. https://collections.library.yale.edu/catalog/11774529.