Allen, R. (2004). The penguin dictionary. London: Penguin.
Trích dẫn kiểu ChicagoAllen, Robert. The Penguin Dictionary. London: Penguin, 2004.
MLA引文Allen, Robert. The Penguin Dictionary. London: Penguin, 2004.
警告：这些引文格式不一定是100％准确.
APA引文