MLA

Loy, Mina (1882-1966). "Revelation". Box 5, folder 118. n.d.. https://collections.library.yale.edu/catalog/11700465.

APA, 6th edition

Loy, Mina (1882-1966). (["Box 5, folder 118"])(n.d.)["Revelation"]. https://collections.library.yale.edu/catalog/11700465.