APA (7th ed.) Citation

O'Brien, B. (1999). The long war : the IRA & Sinn Fein / Brendan O'Brien: The IRA & Sinn Fein (Updated ed.). O'Brien Press.

Chicago Style (17th ed.) Citation

O'Brien, Brendan. The Long War : The IRA & Sinn Fein / Brendan O'Brien: The IRA & Sinn Fein. Updated ed. Dublin: O'Brien Press, 1999.

MLA (9th ed.) Citation

O'Brien, Brendan. The Long War : The IRA & Sinn Fein / Brendan O'Brien: The IRA & Sinn Fein. Updated ed. O'Brien Press, 1999.

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