Hill, I. (2004). Ursula, under: Novel (First edition.). Penguin books.
芝加哥风格引文Hill, Ingrid. Ursula, Under: Novel. First edition. New York: Penguin books, 2004.
MLA引文Hill, Ingrid. Ursula, Under: Novel. First edition. Penguin books, 2004.
警告：这些引文格式不一定是100％准确.