Cita APA (7a ed.)

Thomson, A. (1970). A practical English grammer Economics 1 to 6. O U P.

Cita Chicago Style (17a ed.)

Thomson, A. A Practical English Grammer Economics 1 to 6. London: O U P, 1970.

Cita MLA (9a ed.)

Thomson, A. A Practical English Grammer Economics 1 to 6. O U P, 1970.