APA (7th ed.) Citation

Mannion,Maura, & O'Brien, D. (1920). Photo of O'Brien brothers in 1920.

Chicago Style (17th ed.) Citation

Mannion,Maura, and Dennis O'Brien. Photo of O'Brien Brothers in 1920. 1920.

MLA (9th ed.) Citation

Mannion,Maura, and Dennis O'Brien. Photo of O'Brien Brothers in 1920. 1920.

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