MLA

Van Vechten, Carl, 1880-1964. Connecticut. Putnam. Hull, Elizabeth Shaffer, home, known as "Poverty Corners". Box 386, folder 5823. 1941 November 21. https://collections.library.yale.edu/catalog/2047355.

APA, 6th edition

Van Vechten, Carl, 1880-1964. (["Box 386, folder 5823"])(1941 November 21)[Connecticut. Putnam. Hull, Elizabeth Shaffer, home, known as "Poverty Corners"]. https://collections.library.yale.edu/catalog/2047355.