MLA

Kissinger, Henry, 1923-2023. William Scranton. Box 194, folder 7. 1964 March-July. https://collections.library.yale.edu/catalog/11785722.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 194, folder 7"])(1964 March-July)[William Scranton]. https://collections.library.yale.edu/catalog/11785722.