MLA

B-D (Becton Dickinson and Company) Yale, George P. Pilling and Son Company. Binaural Stethoscopes. Box 091. 20th century. https://collections.library.yale.edu/catalog/17321939.

APA, 6th edition

B-D (Becton Dickinson and Company) Yale, & George P. Pilling and Son Company. (["Box 091"])(20th century)[Binaural Stethoscopes]. https://collections.library.yale.edu/catalog/17321939.