MLA

Kissinger, Henry, 1923-2023. "The 1960s: Decade of Danger and a Program to Meet It," Governors' Conference, Jun 28, 1960. Box 157, folder 7. Circa 1960 June. https://collections.library.yale.edu/catalog/11785099.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 157, folder 7"])(Circa 1960 June)["The 1960s: Decade of Danger and a Program to Meet It," Governors' Conference, Jun 28, 1960]. https://collections.library.yale.edu/catalog/11785099.