MLA

Stein, Gertrude, 1874-1946. Calder, Alexander. Box 100, folder 1936. 1932 Mar 9. https://collections.library.yale.edu/catalog/2024666.

APA, 6th edition

Stein, Gertrude, 1874-1946. (["Box 100, folder 1936"])(1932 Mar 9)[Calder, Alexander]. https://collections.library.yale.edu/catalog/2024666.