Cite

"Art of the Night"

MLA

Lewis, Sinclair, 1885-1951. "Art of the Night". Box 43, folder 424. undated. https://collections.library.yale.edu/catalog/17116533.

APA, 6th edition

Lewis, Sinclair, 1885-1951. (["Box 43, folder 424"])(undated)["Art of the Night"]. https://collections.library.yale.edu/catalog/17116533.