Thomson, A. J., & Martinet, A. V. (1986). A practical english grammar (4a. ed.). Oxford University.
Cita Chicago (17th ed.)Thomson, A. J., i André V. Martinet. A Practical English Grammar. 4a. ed. Oxford: Oxford University, 1986.
Cita MLA (9th ed.)Thomson, A. J., i André V. Martinet. A Practical English Grammar. 4a. ed. Oxford University, 1986.
Atenció: Aquestes cites poden no estar 100% correctes.