Cita APA

Ur, P. (2016). Grammar practice activities: A practical guide for teachers (2nd ed.). London [etc.]: Cambridge University Press.

Citación estilo Chicago

Ur, Penny. Grammar Practice Activities: A Practical Guide for Teachers. 2nd ed. London [etc.]: Cambridge University Press, 2016.

Cita MLA

Ur, Penny. Grammar Practice Activities: A Practical Guide for Teachers. 2nd ed. London [etc.]: Cambridge University Press, 2016.