MLA

Kissinger, Henry, 1923-2023. China. Box 228, folder 30. 1974 November. https://collections.library.yale.edu/catalog/12480265.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 228, folder 30"])(1974 November)[China]. https://collections.library.yale.edu/catalog/12480265.