Cita APA (7a ed.)

Thomson, A., & Martinet, A. (1973). A practical english grammar (2nd ed.). Oxford University.

Cita Chicago Style (17a ed.)

Thomson, A.J, y A.V Martinet. A Practical English Grammar. 2nd ed. London: Oxford University, 1973.

Cita MLA (9a ed.)

Thomson, A.J, y A.V Martinet. A Practical English Grammar. 2nd ed. Oxford University, 1973.