Cita APA (7a ed.)

Thomas, A. (1973). A practical English Grammar- Ex- I to VI. Oxford University Press.

Cita Chicago Style (17a ed.)

Thomas, A. A Practical English Grammar- Ex- I to VI. London: Oxford University Press, 1973.

Cita MLA (9a ed.)

Thomas, A. A Practical English Grammar- Ex- I to VI. Oxford University Press, 1973.