MLA

Kissinger, Henry, 1923-2023. Messages sent, Da-El. Box 151, folder 4. 1969-1973. https://collections.library.yale.edu/catalog/12479886.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 151, folder 4"])(1969-1973)[Messages sent, Da-El]. https://collections.library.yale.edu/catalog/12479886.