APA引文

Card, O. S. (2007). A war of gifts: An Ender story. Tor.

Chicago Style (17th ed.) Citation

Card, Orson Scott. A War of Gifts: An Ender Story. New York: Tor, 2007.

MLA引文

Card, Orson Scott. A War of Gifts: An Ender Story. Tor, 2007.

警告：這些引文格式不一定是100％准確.