Cita APA

Thomson, A. J., & Martinet, A. V. (1997). Practical english grammar: Exercises 1 (3a. ed.). Oxford: Oxford University Press.

Citación estilo Chicago

Thomson, A. J., and A. V. Martinet. Practical English Grammar: Exercises 1. 3a. ed. Oxford: Oxford University Press, 1997.

Cita MLA

Thomson, A. J., and A. V. Martinet. Practical English Grammar: Exercises 1. 3a. ed. Oxford: Oxford University Press, 1997.