Cita APA (7a ed.)
Wren, P. C., & Martin, H. (2006). Higher school english grammar and composition. S. Chand.
Cita Chicago Style (17a ed.)
Wren, P. C., y H. Martin. Higher School English Grammar and Composition. New Delhi: S. Chand, 2006.
Cita MLA (9a ed.)
Wren, P. C., y H. Martin. Higher School English Grammar and Composition. S. Chand, 2006.
Precaución: Estas citas no son 100% exactas.