MLA

Amson, John, and Yale University. School of Medicine M.D. John Amson M.D. 19AD. https://collections.library.yale.edu/catalog/16788793.

APA, 6th edition

Amson, J., & M.D., Y. U. S. of M. (19 C.E.). John Amson M.D. [Bookplates]. https://collections.library.yale.edu/catalog/16788793.