MLA

Norman, Dorothy, 1905-1997. Whitehead, Alfred North. Box 81. 1937-1938. https://collections.library.yale.edu/catalog/32226441.

APA, 6th edition

Norman, Dorothy, 1905-1997. (["Box 81"])(1937-1938)[Whitehead, Alfred North]. https://collections.library.yale.edu/catalog/32226441.