MLA

Crohn, Burrill B., and Yale University. School of Medicine M.D. Vive, Valeque, Ex Libris, Burrill B. Crohn, M.D. 0AD. https://collections.library.yale.edu/catalog/16788836.

APA, 6th edition

Crohn, B. B., & M.D., Y. U. S. of M. (0 C.E.). Vive, Valeque, Ex Libris, Burrill B. Crohn, M.D. [Bookplates]. https://collections.library.yale.edu/catalog/16788836.