O'Brien, T. (2016). The world's 100 greatest speeches. Rupa Publications.
Dyfyniad Arddull ChicagoO'Brien, Terry. The World's 100 Greatest Speeches. New Delhi: Rupa Publications, 2016.
Dyfyniad MLAO'Brien, Terry. The World's 100 Greatest Speeches. Rupa Publications, 2016.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.