APA (7th ed.) Citation

Mannion,Maura, & O'Brien, D. (1937). Photo of Dennis O'Brien and horse.

Chicago Style (17th ed.) Citation

Mannion,Maura, and Dennis O'Brien. Photo of Dennis O'Brien and Horse. 1937.

MLA (9th ed.) Citation

Mannion,Maura, and Dennis O'Brien. Photo of Dennis O'Brien and Horse. 1937.

Warning: These citations may not always be 100% accurate.