MLA

A. H. Johnson (Willimantic, Connecticut). St Joseph's Hospital. Willimantic, Connecticut. box 1, folder 17. circa 1908. https://collections.library.yale.edu/catalog/15789510.

APA, 6th edition

A. H. Johnson (Willimantic, Connecticut). (["box 1, folder 17"])(circa 1908)[St Joseph's Hospital. Willimantic, Connecticut]. https://collections.library.yale.edu/catalog/15789510.