Cita APA (7th ed.)
Wren, P. C., & Martin, H. (2006). Higher school english grammar and composition. S. Chand.
Cita Chicago (17th ed.)
Wren, P. C., i H. Martin. Higher School English Grammar and Composition. New Delhi: S. Chand, 2006.
Cita MLA (9th ed.)
Wren, P. C., i H. Martin. Higher School English Grammar and Composition. S. Chand, 2006.
Atenció: Aquestes cites poden no estar 100% correctes.