Caldwell, I. (2004). The rule of four. Dial Press.
芝加哥风格引文Caldwell, Ian. The Rule of Four. New York: Dial Press, 2004.
MLA引文Caldwell, Ian. The Rule of Four. Dial Press, 2004.
警告：这些引文格式不一定是100％准确.
APA引文
Caldwell, I. (2004). The rule of four. Dial Press.
芝加哥风格引文Caldwell, Ian. The Rule of Four. New York: Dial Press, 2004.
MLA引文Caldwell, Ian. The Rule of Four. Dial Press, 2004.