Hadfield, J., & Hadfield, C. (1999). Simple speaking activities. Oxford: Oxford University Press.
Chicago Style CitationHadfield, Jill, i Charles Hadfield. Simple Speaking Activities. Oxford: Oxford University Press, 1999.
Cita MLAHadfield, Jill, i Charles Hadfield. Simple Speaking Activities. Oxford: Oxford University Press, 1999.
Atenció: Aquestes cites poden no estar 100% correctes.