MLA

Kissinger, Henry, 1923-2023. China. Box 223, folder 4. 1975 December. https://collections.library.yale.edu/catalog/12480136.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 223, folder 4"])(1975 December)[China]. https://collections.library.yale.edu/catalog/12480136.