MLA

Cooper, William (West Haven, CT), MacNicholl, T. Alexander, MD (Meriden, CT). Premier vibrator. Box 180. ca. 1896. https://collections.library.yale.edu/catalog/17316659.

APA, 6th edition

Cooper, William (West Haven, CT), & MacNicholl, T. Alexander, MD (Meriden, CT). (["Box 180"])(ca. 1896)[Premier vibrator]. https://collections.library.yale.edu/catalog/17316659.