MLA

Kissinger, Henry, 1923-2023. Ransom, Harry Howe. Box 50, folder 12. 1959-1966. https://collections.library.yale.edu/catalog/11783327.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 50, folder 12"])(1959-1966)[Ransom, Harry Howe]. https://collections.library.yale.edu/catalog/11783327.