MLA

Kissinger, Henry, 1923-2023. Damascus, Syria. Box 228, folder 28. 1974 May 24. https://collections.library.yale.edu/catalog/12480260.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 228, folder 28"])(1974 May 24)[Damascus, Syria]. https://collections.library.yale.edu/catalog/12480260.