APA ציטוט

Crystal, D. (2005). The Penguin factfinder. London ; New York: Penguin.

Trích dẫn kiểu Chicago

Crystal, David. The Penguin Factfinder. London ; New York: Penguin, 2005.

ציטוט MLA

Crystal, David. The Penguin Factfinder. London ; New York: Penguin, 2005.