May, P. (2004). IELTS: Practice tests. Oxford University Press.
Cita Chicago (17th ed.)May, Peter. IELTS: Practice Tests. New York: Oxford University Press, 2004.
Cita MLA (9th ed.)May, Peter. IELTS: Practice Tests. Oxford University Press, 2004.
Atenció: Aquestes cites poden no estar 100% correctes.