Cita APA (7th ed.)
Smalzer, W. R., & Murphy, R. Grammar in Use Intermediate: With Answers : Workbook. Cambridge University.
Cita Chicago (17th ed.)
Smalzer, William R., i Raymond Murphy. Grammar in Use Intermediate: With Answers : Workbook. Cambridge, Inglaterra: Cambridge University.
Cita MLA (9th ed.)
Smalzer, William R., i Raymond Murphy. Grammar in Use Intermediate: With Answers : Workbook. Cambridge University.
Atenció: Aquestes cites poden no estar 100% correctes.