MLA

Bertram, Alex, and M. D. Alex Bertram, M.D. 0AD. https://collections.library.yale.edu/catalog/16789119.

APA, 6th edition

Bertram, A., & M. D. (0 C.E.). Alex Bertram, M.D. [Bookplates]. https://collections.library.yale.edu/catalog/16789119.