Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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