MLA

Bunting, Charles H., MD (1955), De Zeng Standard Company. Ophthalmoscope and Otoscope. Box 019. 19th century. https://collections.library.yale.edu/catalog/17319705.

APA, 6th edition

Bunting, Charles H., MD (1955), & De Zeng Standard Company. (["Box 019"])(19th century)[Ophthalmoscope and Otoscope]. https://collections.library.yale.edu/catalog/17319705.