Naylor Helen & Murphy Raymond. (2000). Essential Grammar in Use Supplementary Exercises with Answers. Cambridge, Cambridge University Press, 2000.
Chicago-viite (17. p.)Naylor Helen ja Murphy Raymond. Essential Grammar in Use Supplementary Exercises with Answers. Cambridge, Cambridge University Press, 2000, 2000.
MLA-viite (9. p.)Naylor Helen ja Murphy Raymond. Essential Grammar in Use Supplementary Exercises with Answers. Cambridge, Cambridge University Press, 2000, 2000.
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