MLA

of Medicine, Yale University. School. Ex Libris, Creighton Barker. 0AD. https://collections.library.yale.edu/catalog/16788799.

APA, 6th edition

of Medicine, Y. U. S. (0 C.E.). Ex Libris, Creighton Barker [Bookplates]. https://collections.library.yale.edu/catalog/16788799.