刘颖. (2008). 话说世界: Talking about the world. 北京出版社.
Chicago Style aipamena刘颖. 话说世界: Talking About the World. 北京出版社, 2008.
MLA aipamena刘颖. 话说世界: Talking About the World. 北京出版社, 2008.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.
APA aipamena