MLA

Kissinger, Henry, 1923-2023. Lincoln, George A.. Box 38, folder 20. 1956-1964. https://collections.library.yale.edu/catalog/11783073.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 38, folder 20"])(1956-1964)[Lincoln, George A.]. https://collections.library.yale.edu/catalog/11783073.