Summerfield, G., & Tunnicliffe, S. (1971). English in practice: Secondary English departments at work. Cambridge University Press.

Summerfield, Geoffrey, and Stephen Tunnicliffe. English in Practice: Secondary English Departments at Work. Cambridge [Eng.]: Cambridge University Press, 1971.

Summerfield, Geoffrey, and Stephen Tunnicliffe. English in Practice: Secondary English Departments at Work. Cambridge University Press, 1971.