MLA

Van Thal, Herbert, 1904-1983. Elizabeth, Queen [consort]. Box 1, folder 38. 1948. https://collections.library.yale.edu/catalog/16545942.

APA, 6th edition

Van Thal, Herbert, 1904-1983. (["Box 1, folder 38"])(1948)[Elizabeth, Queen [consort]]. https://collections.library.yale.edu/catalog/16545942.