APA (7th ed.) Citation

O'Brien, J. T. (1851). The Papal aggression. George Herbert.

Chicago Style (17th ed.) Citation

O'Brien, James Thomas. The Papal Aggression. Dublin: George Herbert, 1851.

MLA (9th ed.) Citation

O'Brien, James Thomas. The Papal Aggression. George Herbert, 1851.

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