MLA

Kissinger, Henry, 1923-2023. Seminar beginnings. Box 132, folder 6. Circa 1951. https://collections.library.yale.edu/catalog/11784671.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 132, folder 6"])(Circa 1951)[Seminar beginnings]. https://collections.library.yale.edu/catalog/11784671.