Cita APA (7a ed.)

Thomson, A. J., & Martinet, A. V. (1989). A practical English grammar (4th ed., 7th impression.). Oxford University Press.

Cita Chicago Style (17a ed.)

Thomson, A. J., y A. V. Martinet. A Practical English Grammar. 4th ed., 7th impression. Oxford: Oxford University Press, 1989.

Cita MLA (9a ed.)

Thomson, A. J., y A. V. Martinet. A Practical English Grammar. 4th ed., 7th impression. Oxford University Press, 1989.