Cita APA (7a ed.)

Murphy, R., & Smalzer, W. R. (2006). Grammar in use intermediate with answers (2nd ed., 15th. print.). Cambridge University Press.

Cita Chicago Style (17a ed.)

Murphy, Raymond, y William R. Smalzer. Grammar in Use Intermediate with Answers. 2nd ed., 15th. print. Cambridge ; New York: Cambridge University Press, 2006.

Cita MLA (9a ed.)

Murphy, Raymond, y William R. Smalzer. Grammar in Use Intermediate with Answers. 2nd ed., 15th. print. Cambridge University Press, 2006.