MLA

Van Thal, Herbert, 1904-1983. "W" general. Box 2, folder 128. 1931-73. https://collections.library.yale.edu/catalog/16546032.

APA, 6th edition

Van Thal, Herbert, 1904-1983. (["Box 2, folder 128"])(1931-73)["W" general]. https://collections.library.yale.edu/catalog/16546032.