Haines S. Simon. (2008). Real Writing 4 with answers. Cambridge, Cambridge University Press, 2008.
Cita Chicago (17th ed.)Haines S. Simon. Real Writing 4 with Answers. Cambridge, Cambridge University Press, 2008, 2008.
Cita MLA (9th ed.)Haines S. Simon. Real Writing 4 with Answers. Cambridge, Cambridge University Press, 2008, 2008.
Atenció: Aquestes cites poden no estar 100% correctes.