MLA

Kissinger, Henry, 1923-2023. Real estate agents. Box 50, folder 17. Circa 1947-circa 1968. https://collections.library.yale.edu/catalog/11783332.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 50, folder 17"])(Circa 1947-circa 1968)[Real estate agents]. https://collections.library.yale.edu/catalog/11783332.