MLA

Loy, Mina (1882-1966). "Rome": draft fragments. Box 1, folder 7. n.d.. https://collections.library.yale.edu/catalog/11134427.

APA, 6th edition

Loy, Mina (1882-1966). (["Box 1, folder 7"])(n.d.)["Rome": draft fragments]. https://collections.library.yale.edu/catalog/11134427.