Cita APA (7a ed.)

Eastwood, J., & Mackin, R. (1982). A Basic English grammar. Oxford University.

Cita Chicago Style (17a ed.)

Eastwood, John, y Ronald Mackin. A Basic English Grammar. Oxford: Oxford University, 1982.

Cita MLA (9a ed.)

Eastwood, John, y Ronald Mackin. A Basic English Grammar. Oxford University, 1982.