"When I was a Page in the Gothic Age..." poem
MLA
Lewis, Sinclair, 1885-1951. "When I was a Page in the Gothic Age..." poem. Box 41, folder 398. undated. https://collections.library.yale.edu/catalog/17116530.
APA, 6th edition
Lewis, Sinclair, 1885-1951. (["Box 41, folder 398"])(undated)["When I was a Page in the Gothic Age..." poem]. https://collections.library.yale.edu/catalog/17116530.