APA (7th ed.) Citation

O'Donoghue, B. (2006). Sir Gawain and the Green Knight. Penguin.

Chicago Style (17th ed.) Citation

O'Donoghue, Bernard. Sir Gawain and the Green Knight. London: Penguin, 2006.

MLA (9th ed.) Citation

O'Donoghue, Bernard. Sir Gawain and the Green Knight. Penguin, 2006.

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