Cita APA (7a ed.)

Eastwood, J. (1992). Oxford practice grammar: With answers. Oxford University Press.

Cita Chicago Style (17a ed.)

Eastwood, John. Oxford Practice Grammar: With Answers. Oxford [etc.]: Oxford University Press, 1992.

Cita MLA (9a ed.)

Eastwood, John. Oxford Practice Grammar: With Answers. Oxford University Press, 1992.