Graver, B. (1999). Advanced English practice (third edition.). New york: Cambridge University Press.
Chicago Style CitationGraver, B.D. Advanced English Practice. third edition. New york: Cambridge University Press, 1999.
Cita MLAGraver, B.D. Advanced English Practice. third edition. New york: Cambridge University Press, 1999.
Atenció: Aquestes cites poden no estar 100% correctes.