MLA

Kissinger, Henry, 1923-2023. Phillips Collection. Box 671, folder 3. 1980-1990. https://collections.library.yale.edu/catalog/11780970.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 671, folder 3"])(1980-1990)[Phillips Collection]. https://collections.library.yale.edu/catalog/11780970.