MLA

Kissinger, Henry, 1923-2023. Berger, Suzanne. Box 198, folder 10. Circa 1967-circa 1968. https://collections.library.yale.edu/catalog/11785812.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 198, folder 10"])(Circa 1967-circa 1968)[Berger, Suzanne]. https://collections.library.yale.edu/catalog/11785812.