MLA

Kissinger, Henry, 1923-2023. Schlesinger, Arthur, Jr.. Box 54, folder 5. 1952-1954. https://collections.library.yale.edu/catalog/11783411.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 54, folder 5"])(1952-1954)[Schlesinger, Arthur, Jr.]. https://collections.library.yale.edu/catalog/11783411.