MLA

Kissinger, Henry, 1923-2023. Conference on "The Uses of Political Geography," Harvard University, Jul 29-31, 1957. Box 117, folder 15. Circa 1957. https://collections.library.yale.edu/catalog/11784388.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 117, folder 15"])(Circa 1957)[Conference on "The Uses of Political Geography," Harvard University, Jul 29-31, 1957]. https://collections.library.yale.edu/catalog/11784388.