Cita APA (7a ed.)

Cowan, R. a. (2008). Teacher?s grammar of english: A course book and reference guide (1a edición.). Cambridge University Press.

Cita Chicago Style (17a ed.)

Cowan, Ron autor. Teacher?s Grammar of English: A Course Book and Reference Guide. 1a edición. New York: Cambridge University Press, 2008.

Cita MLA (9a ed.)

Cowan, Ron autor. Teacher?s Grammar of English: A Course Book and Reference Guide. 1a edición. Cambridge University Press, 2008.