Thomas B. J. (1997). Intermediate Vocabulary. Longman, 1997.
Cita Chicago (17th ed.)Thomas B. J. Intermediate Vocabulary. Longman, 1997, 1997.
Cita MLA (9th ed.)Thomas B. J. Intermediate Vocabulary. Longman, 1997, 1997.
Atenció: Aquestes cites poden no estar 100% correctes.