Cita APA (7a ed.)

Murphy, R. (2007). Essential grammar in use (3th ed.). Cambridge University Press.

Cita Chicago Style (17a ed.)

Murphy, Raymond. Essential Grammar in Use. 3th ed. Cambridge: Cambridge University Press, 2007.

Cita MLA (8a ed.)

Murphy, Raymond. Essential Grammar in Use. 3th ed. Cambridge University Press, 2007.