MLA

Kissinger, Henry, 1923-2023. East-West trade. Box 227, folder 4. Circa 1968. https://collections.library.yale.edu/catalog/11786219.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 227, folder 4"])(Circa 1968)[East-West trade]. https://collections.library.yale.edu/catalog/11786219.