Cita APA (7th ed.)

Trask, R. (2000). The penguin dictionary of English grammar. Penguin Books.

Cita Chicago (17th ed.)

Trask, R.L. The Penguin Dictionary of English Grammar. London: Penguin Books, 2000.

Cita MLA (9th ed.)

Trask, R.L. The Penguin Dictionary of English Grammar. Penguin Books, 2000.