MLA

Kissinger, Henry, 1923-2023. Albonetti, Achille. Box 1, folder 18. 1963 January-July. https://collections.library.yale.edu/catalog/11782297.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 1, folder 18"])(1963 January-July)[Albonetti, Achille]. https://collections.library.yale.edu/catalog/11782297.