Cita APA (7a ed.)

(2011). Collins Cobuild english grammar (3rd ed.). HarperCollins.

Cita Chicago Style (17a ed.)

Collins Cobuild English Grammar. 3rd ed. Glasgow: HarperCollins, 2011.

Cita MLA (9a ed.)

Collins Cobuild English Grammar. 3rd ed. HarperCollins, 2011.