Matthiesen, S. J. (2004). Essential words for the TOEFL, test of English as a foreign language (3rd ed.). Barron's.
Chicago-Zitierstil (17. Ausg.)Matthiesen, Steven J. Essential Words for the TOEFL, Test of English as a Foreign Language. 3rd ed. Hauppauge, N.Y: Barron's, 2004.
MLA-Zitierstil (9. Ausg.)Matthiesen, Steven J. Essential Words for the TOEFL, Test of English as a Foreign Language. 3rd ed. Barron's, 2004.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.