Cita APA (7a ed.)

Thomson, A. J. (1986). A practical english grammar. (3th ed.). Oxford University Press.

Cita Chicago Style (17a ed.)

Thomson, A. J. A Practical English Grammar. 3th ed. Oxford: Oxford University Press, 1986.

Cita MLA (8a ed.)

Thomson, A. J. A Practical English Grammar. 3th ed. Oxford University Press, 1986.