Matthiesen, S. J. (2004). Essential words for the TOEFL, test of English as a foreign language (3rd ed.). Barron's.
Lua i Stíl Chicago (17ú heag.)Matthiesen, Steven J. Essential Words for the TOEFL, Test of English as a Foreign Language. 3rd ed. Hauppauge, N.Y: Barron's, 2004.
Lua MLA (9ú heag.)Matthiesen, Steven J. Essential Words for the TOEFL, Test of English as a Foreign Language. 3rd ed. Barron's, 2004.
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