MLA

Kissinger, Henry, 1923-2023. "Let Freedom Ring: A Centennial Memorandum for the 1960 Republican Party Platform," Jul 19, 1960. Box 157, folder 9. 1960 July. https://collections.library.yale.edu/catalog/11785101.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 157, folder 9"])(1960 July)["Let Freedom Ring: A Centennial Memorandum for the 1960 Republican Party Platform," Jul 19, 1960]. https://collections.library.yale.edu/catalog/11785101.