Cita APA (7a ed.)

Harper Collins Publishers & The University of Birmingham. (1993). Collins COBUILD: English usage. HarperCollinsAcademic.

Cita Chicago Style (17a ed.)

Harper Collins Publishers y The University of Birmingham. Collins COBUILD: English Usage. London: HarperCollinsAcademic, 1993.

Cita MLA (9a ed.)

Harper Collins Publishers y The University of Birmingham. Collins COBUILD: English Usage. HarperCollinsAcademic, 1993.