MLA

Kissinger, Henry, 1923-2023. "Problems of American Foreign Policy," Great Issues course, Dartmouth College, Mar 17, 1958. Box 243, folder 1. Circa 1958 March. https://collections.library.yale.edu/catalog/11786383.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 243, folder 1"])(Circa 1958 March)["Problems of American Foreign Policy," Great Issues course, Dartmouth College, Mar 17, 1958]. https://collections.library.yale.edu/catalog/11786383.