MLA

Kissinger, Henry, 1923-2023. Finkelstein, Lawrence S.. Box 20, folder 13. 1967-1968. https://collections.library.yale.edu/catalog/11782672.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 20, folder 13"])(1967-1968)[Finkelstein, Lawrence S.]. https://collections.library.yale.edu/catalog/11782672.