MLA

Van Thal, Herbert, 1904-1983. "M" general. Box 1, folder 79. 1935-65. https://collections.library.yale.edu/catalog/16545983.

APA, 6th edition

Van Thal, Herbert, 1904-1983. (["Box 1, folder 79"])(1935-65)["M" general]. https://collections.library.yale.edu/catalog/16545983.