MLA

Kissinger, Henry, 1923-2023. Messages received, Wa. Box 150, folder 10. 1968-1973. https://collections.library.yale.edu/catalog/12479749.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 150, folder 10"])(1968-1973)[Messages received, Wa]. https://collections.library.yale.edu/catalog/12479749.