MLA

E. S. Meyerowitz, Lane, and John E. Loring Ophthalmoscope. 19AD. https://collections.library.yale.edu/catalog/17319707.

APA, 6th edition

E. S. Meyerowitz, L., & E., J. (19 C.E.). Loring Ophthalmoscope [Artifacts]. https://collections.library.yale.edu/catalog/17319707.