Cita APA (7a ed.)

Thomson, A., & Martinet, A. (1999). A practical english grammar: Exercises (3rd ed.). Oxford University.

Cita Chicago Style (17a ed.)

Thomson, A.J, y A.V Martinet. A Practical English Grammar: Exercises. 3rd ed. Oxford: Oxford University, 1999.

Cita MLA (8a ed.)

Thomson, A.J, y A.V Martinet. A Practical English Grammar: Exercises. 3rd ed. Oxford University, 1999.