MLA

Bree, Charles Robert. Charles Robert Bree, M.D., P.Z.S. 0AD. https://collections.library.yale.edu/catalog/16789170.

APA, 6th edition

Bree, C. R. (0 C.E.). Charles Robert Bree, M.D., P.Z.S. [Bookplates]. https://collections.library.yale.edu/catalog/16789170.