Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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