Cita APA (7th ed.)

Hill, I. (2004). Ursula, under: Novel (First edition.). Penguin books.

Cita Chicago (17th ed.)

Hill, Ingrid. Ursula, Under: Novel. First edition. New York: Penguin books, 2004.

Cita MLA (9th ed.)

Hill, Ingrid. Ursula, Under: Novel. First edition. Penguin books, 2004.