Cita APA (7a ed.)

Eastwood, J. (1991). A basic english grammar: Exercises : with key ([2nd. ed., 2nd. impr.].). Oxford University Press.

Cita Chicago Style (17a ed.)

Eastwood, John. A Basic English Grammar: Exercises : With Key. [2nd. ed., 2nd. impr.]. Oxford: Oxford University Press, 1991.

Cita MLA (9a ed.)

Eastwood, John. A Basic English Grammar: Exercises : With Key. [2nd. ed., 2nd. impr.]. Oxford University Press, 1991.