MLA

Loy, Mina (1882-1966). On Literature. Box 7, folder 190. 1948, n.d.. https://collections.library.yale.edu/catalog/11866223.

APA, 6th edition

Loy, Mina (1882-1966). (["Box 7, folder 190"])(1948, n.d.)[On Literature]. https://collections.library.yale.edu/catalog/11866223.