MLA

Beckwith, Arthur, Beckwith, Leonard F. (Leonard Forbes). École des beaux arts, concours.. 1868?]. https://collections.library.yale.edu/catalog/10622643.

APA, 6th edition

Beckwith, Arthur, & Beckwith, Leonard F. (Leonard Forbes). (1868?])[École des beaux arts, concours.]. https://collections.library.yale.edu/catalog/10622643.