MLA

Kissinger, Henry, 1923-2023. Ma. Box 590, folder 12. 1990-1993. https://collections.library.yale.edu/catalog/11779958.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 590, folder 12"])(1990-1993)[Ma]. https://collections.library.yale.edu/catalog/11779958.