APA引文

Levitt, S. D. (2006). Freakonomics. Penguin books.

Chicago Edition Citation

Levitt, Steven D. Freakonomics. London: Penguin books, 2006.

MLA引文

Levitt, Steven D. Freakonomics. Penguin books, 2006.

警告：这些引文格式不一定是100％准确.