MLA

Kissinger, Henry, 1923-2023. "U.S. Constitutional Process," handed to Democratic Republic of Vietnam (DRV) leaders in Hanoi by Kissinger, Feb 1973. Box 366, folder 13. 1973. https://collections.library.yale.edu/catalog/11775474.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 366, folder 13"])(1973)["U.S. Constitutional Process," handed to Democratic Republic of Vietnam (DRV) leaders in Hanoi by Kissinger, Feb 1973]. https://collections.library.yale.edu/catalog/11775474.