Cita APA (7a ed.)

THOMSON, A., & MARTINET, A. (1986). A practical English grammar: Exercises 1.-- ed.3. Oxford Univ. Press.

Cita Chicago Style (17a ed.)

THOMSON, A.J, y A.V MARTINET. A Practical English Grammar: Exercises 1.-- Ed.3. Oxford: Oxford Univ. Press, 1986.

Cita MLA (9a ed.)

THOMSON, A.J, y A.V MARTINET. A Practical English Grammar: Exercises 1.-- Ed.3. Oxford Univ. Press, 1986.