Peterson's. (2007). peterson's master toefl writing skills: Boost your toefl score! (First edition.). Peterson's.
Lua i Stíl Chicago (17ú heag.)Peterson's. Peterson's Master Toefl Writing Skills: Boost Your Toefl Score! First edition. Lawrenceville, NJ: Peterson's, 2007.
Lua MLA (9ú heag.)Peterson's. Peterson's Master Toefl Writing Skills: Boost Your Toefl Score! First edition. Peterson's, 2007.
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