APA (7th ed.) Citation

Le Guin, U. K. The Earthsea trilogy. Gollancz.

Chicago Style (17th ed.) Citation

Le Guin, Ursula K. The Earthsea Trilogy. London: Gollancz.

MLA (9th ed.) Citation

Le Guin, Ursula K. The Earthsea Trilogy. Gollancz.

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