Cite

to Mrs. William F. Cowper

MLA

Liebert, Herman W. (1911-1994). to Mrs. William F. Cowper. Box 5, folder 225. n.d.. https://collections.library.yale.edu/catalog/16495416.

APA, 6th edition

Liebert, Herman W. (1911-1994). (["Box 5, folder 225"])(n.d.)[to Mrs. William F. Cowper]. https://collections.library.yale.edu/catalog/16495416.