APA引文

Robert Ludlum & Gayle Lynds. (2000). The heads factor. Harper Collins.

Chicago Edition Citation

Robert Ludlum and Gayle Lynds. The Heads Factor. London: Harper Collins, 2000.

MLA引文

Robert Ludlum and Gayle Lynds. The Heads Factor. Harper Collins, 2000.

警告：这些引文格式不一定是100％准确.