Cita APA (7a ed.)

THOMSON, A. (1970). A practical English grammar: Exercises 1-6. E.L.B.S.,O.U.P.

Cita Chicago Style (17a ed.)

THOMSON, A.J. A Practical English Grammar: Exercises 1-6. London: E.L.B.S.,O.U.P, 1970.

Cita MLA (9a ed.)

THOMSON, A.J. A Practical English Grammar: Exercises 1-6. E.L.B.S.,O.U.P, 1970.