Cita APA (7th ed.)
Peters, R. (2000). The Cambridge guide to english usage. CUP.
Cita Chicago (17th ed.)
Peters, Ram. The Cambridge Guide to English Usage. Cambridge: CUP, 2000.
Cita MLA (9th ed.)
Peters, Ram. The Cambridge Guide to English Usage. CUP, 2000.
Atenció: Aquestes cites poden no estar 100% correctes.