Cita APA (7a ed.)
Murphy, R. (1997). Essential grammar in use (2a. ed.). At the University Press.
Cita Chicago Style (17a ed.)
Murphy, Raymond. Essential Grammar in Use. 2a. ed. Cambridge: At the University Press, 1997.
Cita MLA (9a ed.)
Murphy, Raymond. Essential Grammar in Use. 2a. ed. At the University Press, 1997.
Precaución: Estas citas no son 100% exactas.