MLA

Danziger & Berman (New Haven, Connecticut). Dr Mason's Hospital. Willimantic, Connecticut. box 1, folder 17. circa 1900-1979. https://collections.library.yale.edu/catalog/15789507.

APA, 6th edition

Danziger & Berman (New Haven, Connecticut). (["box 1, folder 17"])(circa 1900-1979)[Dr Mason's Hospital. Willimantic, Connecticut]. https://collections.library.yale.edu/catalog/15789507.