SPENCER, D. (1973). English conversation practice. Oxford Univ. Press.
芝加哥风格引文SPENCER, D.H. English Conversation Practice. London: Oxford Univ. Press, 1973.
MLA引文SPENCER, D.H. English Conversation Practice. Oxford Univ. Press, 1973.
警告：这些引文格式不一定是100％准确.