Cite

"To Betty," poems

MLA

Lewis, Sinclair, 1885-1951. "To Betty," poems. Box 40, folder 387. 1949. https://collections.library.yale.edu/catalog/17116529.

APA, 6th edition

Lewis, Sinclair, 1885-1951. (["Box 40, folder 387"])(1949)["To Betty," poems]. https://collections.library.yale.edu/catalog/17116529.