MLA

A. C. Basselman & Co. (New York). New Haven Hospital, New Haven, Connecticut. box 1, folder 8. circa 1906. https://collections.library.yale.edu/catalog/15789390.

APA, 6th edition

A. C. Basselman & Co. (New York). (["box 1, folder 8"])(circa 1906)[New Haven Hospital, New Haven, Connecticut]. https://collections.library.yale.edu/catalog/15789390.