MLA

Kissinger, Henry, 1923-2023. "U.S. Strategy for the Future," War College, Air University, Maxwell Air Force Base, Apr 25-Jun 3, 1960. Box 246, folder 13. Circa 1960. https://collections.library.yale.edu/catalog/11786440.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 246, folder 13"])(Circa 1960)["U.S. Strategy for the Future," War College, Air University, Maxwell Air Force Base, Apr 25-Jun 3, 1960]. https://collections.library.yale.edu/catalog/11786440.