MLA

Van Thal, Herbert, 1904-1983. Doyle, Adrian Conan. Box 1, folder 33. 1947-48. https://collections.library.yale.edu/catalog/16545937.

APA, 6th edition

Van Thal, Herbert, 1904-1983. (["Box 1, folder 33"])(1947-48)[Doyle, Adrian Conan]. https://collections.library.yale.edu/catalog/16545937.