MLA

Loy, Mina (1882-1966). Fragments. Box 4, folder 70-71. n.d.. https://collections.library.yale.edu/catalog/11698159.

APA, 6th edition

Loy, Mina (1882-1966). (["Box 4, folder 70-71"])(n.d.)[Fragments]. https://collections.library.yale.edu/catalog/11698159.