MLA

Kissinger, Henry, 1923-2023. Morse, Bradford. Box 42, folder 23. 1965-1967. https://collections.library.yale.edu/catalog/11783168.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 42, folder 23"])(1965-1967)[Morse, Bradford]. https://collections.library.yale.edu/catalog/11783168.