MLA

Van Thal, Herbert, 1904-1983. Haley, William. Box 1, folder 55. 1965-66. https://collections.library.yale.edu/catalog/16545959.

APA, 6th edition

Van Thal, Herbert, 1904-1983. (["Box 1, folder 55"])(1965-66)[Haley, William]. https://collections.library.yale.edu/catalog/16545959.