MLA

Fulton, John Farquhar. Ex Libris, John Farquhar Fulton. 0AD. https://collections.library.yale.edu/catalog/16788856.

APA, 6th edition

Fulton, J. F. (0 C.E.). Ex Libris, John Farquhar Fulton [Bookplates]. https://collections.library.yale.edu/catalog/16788856.