MLA

Loy, Mina (1882-1966). "Gloria": draft. Box 1, folder 3. n.d.. https://collections.library.yale.edu/catalog/11124035.

APA, 6th edition

Loy, Mina (1882-1966). (["Box 1, folder 3"])(n.d.)["Gloria": draft]. https://collections.library.yale.edu/catalog/11124035.