Summerfield, G., & Tunnicliffe, S. (1971). English in practice: Secondary English departments at work. Cambridge University Press.
芝加哥风格引文Summerfield, Geoffrey, 与 Stephen Tunnicliffe. English in Practice: Secondary English Departments at Work. Cambridge [Eng.]: Cambridge University Press, 1971.
MLA引文Summerfield, Geoffrey, 与 Stephen Tunnicliffe. English in Practice: Secondary English Departments at Work. Cambridge University Press, 1971.
警告：这些引文格式不一定是100％准确.