Sharpe, P. J. (2001). How to prepare for the toefl test (Tenth edition.). Barron's.
Lua i Stíl Chicago (17ú heag.)Sharpe, Pamela J. How to Prepare for the Toefl Test. Tenth edition. New York: Barron's, 2001.
Lua MLA (9ú heag.)Sharpe, Pamela J. How to Prepare for the Toefl Test. Tenth edition. Barron's, 2001.
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