MLA

Kissinger, Henry, 1923-2023. Korea-Harry Truman. Box 201, folder 2. 1951-1957, undated. https://collections.library.yale.edu/catalog/12481459.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 201, folder 2"])(1951-1957, undated)[Korea-Harry Truman]. https://collections.library.yale.edu/catalog/12481459.