MLA

Kissinger, Henry, 1923-2023. Ma. Box 490, folder 12. 1986-1987. https://collections.library.yale.edu/catalog/11778475.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 490, folder 12"])(1986-1987)[Ma]. https://collections.library.yale.edu/catalog/11778475.